Best S Boys Swim Trunks in 2026

Upf 50+ quick dry microfiber: lightweight and durable for your most comfortable pair of boys swim trunks

Side seam pockets and cargo pockets give plenty of options for storage

Available in men's sizes S-XXL and boys sizes 2T through 20 so dad's and kids can hit the beach as a team

Officially licensed Pokemon big boys cute and stylish swimming shorts bottoms

Action packed design features all-over print of your favorite Pokémon characters: Pikachu, Squirtle, and Bulbasaur

All over print design; Awesome sublimation print design; UPF 50+ material for UVB and UVA protection and worry-free sun time

ADORABLE DESIGN - Features the cutest prints and patterns for the perfect vacation ready look for your little guy.

COMFORTABLE FIT - The stretchy waistband ensures easy changing and comfort all day long.

DESIGNED IN USA—Designed by moms who believe in the beauty of quality products and superior customer service. High quality and darling design is the guiding principle behind RuggedButts.

Features: Elastic waistband, drawstring, two side pockets.

UV Protection: The boys swim trunks is made of 100% polyester which is fast-drying, soft and breathable. It can effectively resist UV rays and protect the kids skin.

Novelty patterns: 3D printing, lifelike and never fade. You will have a variety of options in here: ferocious dinosaurs, rave cats, scary skulls, laid-back beaches, etc.

☀ RECYCLED 4-WAY STRETCHY FABRIC - Shell: 90% recycled polyester, 10% spandex.Durable swimming bottoms,light weight high-performance & water repellent for Quick-drying,with moisture-wicking features and a UPF 50+ finish to protect kids from the sun’s harmful ultraviolet rays.

☀ COMFORTABLE BOXER BRIEF LINER - Super soft smooth material for the built-in compression liner, but lining is not too tight,considering your kids need some give in the growing period.This swimming trunks will allow your boys to enjoy the beach,pool without chafing burn,comfortable & supportive.Also it's not only a bathing suit,but also a nice piece for playing,running,training,workout...

☀ FUNCTIONAL DRAWSTRING & METAL GROMMETS - These boys' swimsuits have real drawstring all around waist which can be tighten,kind elastic waistband offers a great, personal fit even for slim and husky boys,also help secure tightly when performing rigorous activities.Big boys Sizes 6-8 10-12 14-16 18-20 is a must have beachwear essential,including youth young men.

Boys Swim Trunks with UPF 50+: Lightweight, comfortable,waterproof and quick dry 4-way stretch fabric; UPF 50+ which blocks 98% of the sun’s harmful ultraviolet rays.

Boys Beach Shorts with Mesh Liner: You could adjust your waistline freely with elastic waist and drawstring. The mesh lining keeps the swim trunks from sticking to your skin when swimming and sweating.

Boys Swimsuit with Novelty Patterns: Inspired 3D prints with galaxy, smoke, cat, wolf, dinosaur, palm, flag, shark and so on. They will make your style come alive with its unique patterns.

☁☁ UPF 50+ Thin Fabric--Polyester and spandex, durable, soft, with better ability to discharge water/moisture, making the swim trunks lightweight and quick dry.

☁☁ Unique & Cool 3d Pattern Design--100% No fading,cracking.With popular elements and matching international colors, your son will be the center of attention in the beach/pool party, can help you bring lots of compliments.

☁☁ Fashion Printed Beach Shorts--Mesh Lining Inside, elastic waistband with adjustable drawstring, medium length, 2 side pockets give plenty of options for storage.

🐘 According to the buyer's feedback, the size is large, please choose a smaller size according to the actual situation. Thank you!

🐘 QUICK DRY --- Boy Shorts are made of water resistant polyester, water resistant technology dries quickly and protects against the elements

🐘 EXCELLENT SUN PROTECTION ---- Kid boy's board shorts Blocks Out Most of the sun's harmful UV radiation, protect kid's skin. Hand wash and machine wash

Swim shorts have an elastic waist, adjustable drawstring, inner mesh lining, UV 50

Kids sizing: 4/5, 6/7, 8, 10/12, 14/16

Sizing: 4/5 (shown as 4-5 years) and 6/7 (shown as 6-7 years)

❤Material: The Boys' Compression Swim Trunks are made of polyester with a silky compression lining and are ultra-light, breathable, chaf-proof boxer briefs. Flat-angle lining, more comfortable than ordinary triangular mesh lining, covering private parts and preventing skin chafing.

❤ Features: Boys swim shorts are designed with the latest boxer briefs; waterproof, quick-drying, 4-way stretch polyester fabric; a elastic waistband with adjustable drawstring； double side pockets, one pocket lined in the boxer briefs， The side seam pockets adopt mesh fabric to facilitate water and sand drain quickly ，allows kids to move freely in the pool, beach, without restraint.

❤Design: kids Compression swimming trunks with the latest print design, gradient palm tree, gradient blue starry sky, gradient feather, Botanical Green, Geometry, Blue Grass, Miami teal, Bright Royal, make your child more bright in the beach , let your boy have more energy and enthusiasm.

Featuring logo artwork on left leg with a pocket on right leg; sits at the knee

Encased elastic wastband with drawstring closure

UPF 50+ sun protection

Officially licensed Marvel Avengers big boys cool and stylish short sleeve swim shirt top and cute and stylish swimming shorts bottoms

Screen print design featuring all his favorite Marvel Avenger superheroes including Black Panther, Black Widow, Captain America, Iron Man, Rocket Raccoon, The Amazing Spider-Man, and The Incredible Hulk

Pull on closure; Contrast raglan sleeves; Awesome sublimation print design; UPF 50+ material for UVB and UVA protection and worry-free sun time

Officially licensed Star Wars big boys cool and stylish short sleeve swim shirt top and cute and stylish swimming shorts bottoms

All over print design; Contrast raglan sleeves; Awesome sublimation print design; UPF 50+ material for UVB and UVA protection and worry-free sun time; Mesh-lined swim shorts; Drawstring closure; Elastic waist for better fit; Pull on closure

Stylish kid's rash guard shirt and board shorts bathing suit with a comfortable fit and easy-to-dress design; youth fashion swimwear made from material that protects your child from the sun and is safe on skin

Dinosaur Swim Trunks with Functional Drawstring

UPF 50+ sun protection

Covered elastic waistband for a comfy fit

Material: 100% polyester, elastic at the waist, pockets on both sides, safe material, light and comfortable.

Design: The swim trunks are designed with an elastic waist and the drawstrings are tightened. Pockets on both sides for personal items such as cell phones, wallets and keys. The inside of the beach shorts has a silky smooth mesh lining. Safe, quick-drying fabric, free stretch and UPF30 + sun protection index can block harmful UV rays from the sun.

Comfort: A sleek polyester fabric that is lightweight and comfortable for boys' swim pants. You can provide the convenience and comfort you need at the beach, pool or any wandering. Quick dry beach board pants are perfect for you.

&#12304 Boys Swim Trunks &#12305 This boys swim trunks are made of breathable soft quick dry material, High quality, dry fast, cool, colors are vibrant and no fading to the sun.

&#12304UPF50+ Sun Protection&#12305 Boys Swimsuits have excellent sun protection, block out most of the harmful UV Radiation. Friendly for your kid's Skin.

&#12304Elastic Waist with Drawstrings&#12305 This playful wrinkle free shorts are short and above the knee. Elastic waist with drawstrings, with mesh lining, two side pockets,lightweight and comfortable. The drawstring isn't just there for decoration.

GREAT QUALITY: This boy's swim trunk features an elastic waistband with drawstring closure. Extremely durable and comfortable. Made with comfort technology quick dry fabric with UPF 50+ which blocks 98% of the sun’s harmful ultraviolet rays. When you wear these swim trunks for boys you can easily feel how great the quality is compared to the average swimming shorts.

COMFORT: This is so much more than a pair of boys athletic swim trunks. It embodies the spirit of travel or walking for fun. The smooth polyester fabric is lightweight and comfortable. The inside of the shorts has a silky smooth mesh lining which offers all the extra support you need during any activity at the beach, pool, or if you're just lounging around. These boy shorts are known comfort so you can spend an entire day wearing these shorts.

STYLE: Whether you get it for the comfort or for fashion your style will be on full display with this cool and comfortably fit boy's swim trunks with tropical inspired prints. You can be sure no one else will have the same or similar shorts. This unique swim trunk for boys is one of a kind. This playful wrinkle free and water resistant shorts will make your style come alive with its unique patterns.

IDEAL SWIM SHORTS: SLOOSH Kids Swim Trunks compact with side pockets that would be a perfect kids storage. Our board shorts also have elastic waistbands with drawstring closure & quick dry features for long-lasting comfortability.

COOL DESIGN: Sloosh kids swim trunks offer you multiple choices of design, including Classic designs like multi-colored stripe, anchors, & USA flag; Tropical style design like pineapple, leaves, palms; Animal themed designs like flamingos, sharks. All these designs match perfectly with the summer "needs to swim" season.

HIGH QUALITY: Made from 100% high-quality smooth UPF 50+ polyester material, not only providing a lightweight comfortable feeling but also blocks the harmful ultraviolet rays. Kids could run, walk, swim, and more with comfort and ease. Our boy's beach shorts can accommodate machine washing and enable lasting uses.

⚽ FABRIC: Boys' Compression Beach Shorts are made from quick drying, lightweight, breathable and stretchy 100% polyester that blocks 98% of harmful UV rays.

⚽ New Compression Short Liner Design: The Cozople Swim Trunks have a silky smooth stretch Compression Lining. It's a lightweight, ultra-supportive, chaf-resistant Boxer Brief Liner that provides breathability and support as your boy stretch. In addition to that, The Compression Liner Swim Shorts protects your skin from scratches and prevents sand from sticking to your skin.

⚽ FEATURES: Drawstring waist, double side pockets; high-tech 3D all-over pattern printing, durable and non-fading; unique and novel printing styles include stripes, Hawaiian leaves, pineapples, palm trees, flamingos, etc.

Made of SPF/UPF 50+ fibers, machine washable

Comfortable fit: Elastic waistband with adjustable draw string, fix these swim shorts right in place

Soft material: Use ultra soft mesh lining, your boy can wear these swim trunks for whole day without chafing issue

[Updated Boy's Compression Swim Trunks] Silky smooth, lightweight and supportive flat-angle compression lining, which is more soft and comfortable than ordinary mesh lining. The lining won't be too tight, considering that your child will need some giving during the growing period.

[New Generation Compression Liner Design] Our boys swimming trunks are featured with durable, waterproof, quick-drying, not fading. Four-way stretch compression lined swim shorts protect your skin from scratches and prevent sand from sticking to your skin.

[Elasticized Waistband with Drawstring and Convenient Pockets] These bathing suits are designed with drawstring waist, two side pockets and one back Velcro pocket with drainage holes for easy storage.

This boys swim shorts are made of 90% upcycled plastic bottles,it will need about 10 upcycled plastic bottles to make one piece.We just want to protect our earth by this method.Everyone can contribute to the beauty of the earth.

This is 2nd generation of innovative MILANKERR compression lined swim trunks,the different is use Nylon liner with air hole.The Nylon fabric is thin and feel cool when touch it,also it is very stretch.The most important is the air holes,which make it breathable,not hot and quick dry.

Based on the compression liner,you will fell not chafed,more support,more comfortable.This bathing suit is just like wearing underwear. It does not bunch up and doesn’t have to worry about chafing like the classic mesh liner. It holds "things" in place more comfortably and keeps them hidden away better than mesh.

UPF 50+ SUN PROTECTION: These super cool swim trunk shorts are fabricated with UPF 50+ technology to help prevent sunburn and protect your boy’s delicate skin

WATERPROOF ZIPPER POCKET: Don’t worry about your boy losing anything while he's playing in his favorite swim suit; Suitable for sports activities such as surfing, kayaking, swimming, wakeboarding, or running on a sandy beach

QUICK DRY BOARD SHORTS: Swim trunk material wicks moisture and dries fast after fun in the water to keep boys active, fresh, and comfortable while preventing rashes

Comfortable - Our boys swim trunk is made of polyester. The smooth polyester fabric is lightweight, comfortable and quick dry

Mesh Lining Design - The silky smooth mesh lining of our swimming trunk offers all the extra support for your boys during any activities at the beach, pool, or if they are just lounging around. These boys shorts will be a necessary for summer holiday or casual

High Quality - This boy's swim shorts feature an elastic waistband with drawstring closure and two side & one back pockets for convenient storage. Your boy could easily feel how great it is when they wear these swim trunks

OFFICIALLY LICENSED BIG CHILL: Boys’ 2 Pack Swim Suit Trunks; From frigid temperatures to the heat of the tropics, Big Chill has your entire family covered no matter where the vacation takes you

SWIMWEAR FOR BOYS: Skin friendly fabric of these swim shorts for boys is perfect for your boy's delicate skin; Let your son enjoy the summer without worrying about sunburn with our high-quality swim trunks; Perfect while having fun at the pool or beach, these lightweight, durable, and comfortable shorts will withstand all his summer adventures

QUICK DRY: Perfect boys' bathing suit for the beach, pool, and summer vacation; The smooth fabric is durable for a long lasting fit with reduced discomfort and irritation; Reliable UV protection for your boy, so you both can enjoy your day worry-free; These swim trunks for little and big boys are a real summer must-have

Material --- This Boys swim trunks made of 100% polyester and 4 way stretch fabric,very smooth and comfortable for Children's body.Durable swimming shorts,light weight high-performance & water repellent for Quick-drying,with moisture-wicking features and a UPF 50+ finish to protect kids from the sun’s harmful ultraviolet rays.

Features --- Swim Trunks Boys with compression liner design. Super soft smooth material for the built-in boxer brief lining, but lining is not too tight,considering your kids need some give in the growing period.This swimming trunks will allow your boys to enjoy the beach,pool without chafing burn,comfortable & supportive.Also it's not only a bathing suit,but also a nice shorts for playing,running,training,workout.

Elastic waistband drawstring --- This swim trunks for boys is drawstring design and elastic waistband, which can be adjusted to fit the waist freely to prevent the swimming trunks boys from slipping off . 2 large deep mesh pockets on the sides can hold various small objects, which not easy to fall. The velcro tape back pocket could automatically close the pocket without manual control, which is more convenient and safe than the manual zipper and button pocket.

→7.9-8.9" inseam, 16.5-18.7" outseam.Mesh lining:Soft & comfortable.【The price of boys swim trunks is $19.99 for one piece and $29.99 for two pieces. The purchase of 2-piece package is more favorable. When placing an order, please select the color classification of 2-piece package.】

→Soft and comfortable:The boardshort's flatlock seams add softness and protection without skin chafing and irritation. It will fit most boys from 7-13 years

→Quick dry fabric:Our brand boy's bathing suits or swim trunks all get great quick dry function. normally take 5 to 10 minutes, shorts will dry already.lightweight and durable for your boy most comfortable pair of swim trunks.quality material that will withstand all your boy's summer adventures

BLUE OR GREEN MINECRAFT SWIMMING SHORTS FOR BOYS - Our cool Minecraft bathing trunks for children and teens are the best way to splash around during holiday vacations and attend swimming lessons or relax on the beach whilst staying comfortable in gamer style!

GAME BATHING SHORTS AVAILABLE IN A VARIETY OF SIZES - The swim shorts come in sizes; 5-6 years, 6-7 years, 7-8 years, 8-9 years, 9-10 years, 10-11 years, 11-12 years, 12-13 years and 13-14 years offering a comfortable and regular boys fit made for ultimate comfort.

FAST DRYING POLYESTER SWIM BOTTOMS - The swimwear for him is made from polyester for a light and very soft feel. Perfect for your holiday suitcase, the swim shorts have an elasticated waistband for the perfect fit!

FUN SUPER MARIO SWIM SHORTS FOR BOYS - These kids novelty shorts are perfect for any fans of the popular video game, Super Mario. Made from a quick drying polyester with mesh lining inside, these shorts are perfect for swimming lessons, beach and pools days.

KIDS SUPER MARIO BATHING SHORTS AVAILABLE IN VARIETY OF SIZE - The Mario and Luigi swim shorts for him comes in sizes: 3-4 years, 5-6 years, 7-8 years, 9-10 years, 11-12 years and 13-14 years offering a comfortable and regular boys fit made for ultimate comfort.

100% POLYESTER LUIGI AND MARIO SWIM SHORT BOTTOMS - The gamer swimwear for children and teens is made from polyester for a light and very soft feel. Perfect for your holiday suitcase, the Super Mario pool shorts have an adjustable drawstring waistband for the perfect fit!

SWIMWEAR FOR BOYS: Skin friendly fabric of these swim shorts for boys is perfect for your boy's delicate skin; Let your son enjoy the summer with our high-quality swim trunks; Perfect while having fun at the pool or beach, these lightweight, durable, and comfortable shorts will withstand all his summer adventures

QUICK DRY: Perfect boys' bathing suit for the beach, pool, and summer vacation; The smooth fabric is durable for a long lasting fit with reduced discomfort and irritation; This swim trunks multipack for little and big boys is a real summer must-have

BATHING SUIT TRUNKS: Featuring two pairs of quick-dry board shorts, this boys' swim trunks bundle is perfect for the beach, pool, and summer vacation; Multiple sizes, colors, and prints ensure you choose the right match for your son; Purchase several styles and stretch out your boy's summer wardrobe