Best Relaxed Fit Mens Shirts in 2026

Most people settle for heavy, sun-scorched skin or baggy cotton tees that turn into lead weights once they hit the water. The Coolibar Hightide swim shirt changes that dynamic by offering serious UPF 50+ protection that blocks 98% of UVA/UVB rays. During testing, the Aqua Classic fabric felt incredibly silky against the skin, while the matte exterior provided a much more polished look than your standard rash guard. It features a clever drop tail hem with gripper elastic to prevent the shirt from riding up during surfing or snorkeling, and even includes a handy loop to connect to your swim shorts. While it isn't designed for high-intensity gym workouts or heavy moisture-wicking needs, it is a lightweight, quick-drying essential for anyone spending a long day on the ocean.

The Coolibar Aricia Sun Shirt is the ultimate wardrobe essential for the style-conscious traveler who refuses to choose between sun safety and looking sharp. I found the Navy Gingham pattern perfect for transitioning from a morning of heavy sightseeing straight to a casual café lunch without looking like you're wearing bulky hiking gear. The 3Ddri fabric is a standout, utilizing a clever grid pattern that wicks moisture while remaining incredibly lightweight. I particularly appreciated the thoughtful ventilation at the shoulder seams and underarms, which keeps you cool when the heat rises. While it isn't meant for swimming or salt water, the roll-up sleeves with snap tabs and the hidden sun flap on the collar make it a powerhouse for dry, sunny adventures.

You are paddling out past the break for a morning surf session and realize the midday sun is starting to bite. The Coolibar Hightide shirt is designed specifically for these high-exposure moments, providing a robust UPF 50+ shield that blocks 98% of UVA/UVB rays. I found the Aqua Classic fabric to be a standout. It feels silky smooth against the skin while maintaining a matte, flattering exterior. It handles saltwater and chlorine without breaking a sweat, and the modest 4-way stretch allows for plenty of movement during snorkeling or waterskiing. A clever gripper elastic on the drop tail hem ensures the shirt stays put even in choppy water, and the integrated connecting loops make it easy to secure to your swim shorts. Just keep in mind this is a dedicated water sport piece rather than a high-intensity fitness shirt.

You are paddling out past the break during a midday swell, and the last thing you want to worry about is a blistering sunburn on your shoulders and neck. This Coolibar Tulum rash guard is built specifically for those high-exposure water sessions like surfing or snorkeling. The Aqua Classic fabric feels silky smooth against your skin, while the matte exterior offers a sophisticated look that isn't overly shiny. I particularly like the mock neck design, which provides that essential extra layer of protection for your neck area. Because it features flatlock seaming and raglan sleeves, it moves with you without irritating your skin. Just keep in mind that while it is incredibly resistant to chlorine and saltwater, it isn't designed for high-intensity land workouts where moisture-wicking is the priority.

The Coolibar Ultimate Short Sleeve Rash Guard delivers uncompromising sun protection through its high-performance UPF 50+ Aqua Plus fabric. While testing this in aquatic environments, the water-repellent finish was immediately noticeable, causing droplets to bead and roll off rather than soaking the material. The fabric feels incredibly slick and lightweight, utilizing Lycra Xtra Life to ensure it withstands chlorine and saltwater far longer than standard spandex. I particularly appreciated the thoughtful design details, like the underarm eyelets for airflow and the internal connecting loop that keeps the shirt anchored to your swim shorts. It is a specialized piece of gear built specifically for surfing, snorkeling, or waterskiing, though you should stick to the water since it isn't designed for high-intensity land workouts.

Picture yourself drifting through a calm lake or enjoying a slow water aerobics session without the constant worry of a sunburn creeping up your neck. The Coolibar Lawai Ruche Swim Shirt is designed specifically for these leisurely moments, offering a robust UPF 50+ rating that blocks 98% of UVA/UVB rays. The Aqua Classic fabric feels incredibly silky against your skin and features a matte exterior that looks sophisticated in the white and black stripe pattern. I particularly like the adjustable ruche sides, which allow you to customize the length to your preference, and the stand-up collar that provides essential coverage. While it isn't built for high-intensity fitness or heavy sweating, it is a lightweight, quick-drying essential for anyone spending a relaxing afternoon by the pool or ocean.

Sun-scorched legs are a non-negotiable risk for anyone spending hours snorkeling or surfing, making these Coolibar swim tights an essential piece of gear. I found the Aqua Classic fabric to be exceptionally high-performing, offering a silky smooth interior that feels great against the skin while maintaining a sophisticated matte finish on the outside. The UPF 50+ rating provides serious peace of mind by blocking 98% of harmful UVA/UVB rays during long sessions in the water. Because they are specifically engineered to resist both chlorine and saltwater, they hold up much better than standard athletic gear. While the four-way stretch provides a comfortable, non-binding fit via the adjustable draw cord waist, keep in mind these are designed for water immersion rather than high-intensity land workouts to avoid overheating.

Sun-sensitive men who refuse to sacrifice style for safety absolutely need the Coolibar Carson Chambray Shirt in their weekend rotation. I was immediately struck by the ChambrayLite fabric. Because it is crafted from 100% Tencel eucalyptus fibers, it feels incredibly soft against the skin with a texture that mimics premium cotton while remaining much more breathable. It offers serious UPF 50+ protection, blocking 98% of UVA/UVB rays, making it my go-to for gardening or walking the dog without worrying about a burn. The design is thoughtful, featuring roll-up sleeves with convenient button tabs and a classic collared button-down look. While it isn't built for swimming or resisting salt water, it is a masterclass in casual, sustainable leisurewear for everyday outdoor life.

Most technical sun shirts look like they belong on a hiking trail, but the Coolibar Fiera Smart Shirt manages to look perfectly at home in a high-end café. I was surprised by how much intelligence is packed into this Solayo fabric. It offers a sophisticated drape that hides its high-tech moisture-wicking and quick-dry capabilities. The UPF 50+ protection is a lifesaver for long days of sightseeing, and the little details like the microfiber lens cleaner and the RFID-blocking pocket make it a genuine travel companion. While you shouldn't wear this for a swim since it isn't salt or chlorine resistant, it excels as a lightweight, wrinkle-resistant staple for anyone needing to pack light without sacrificing style.

Most people assume high-coverage swimwear means sacrificing mobility, but the Alana swimsuit proves you can stay fully protected without feeling restricted. The Aqua Helios fabric offers a clever balance of medium compression for shape retention and a slick, four-way stretch that handles snorkeling or surfing with ease. I was particularly impressed by the thoughtful design details, like the thumbholes on the full-length sleeves and the convenient hidden zipper pocket tucked along the princess seam. While the mock neckline and extended front zipper make it incredibly easy to get on and off, the specialized fabric is specifically engineered for water sports rather than high-intensity land fitness. It is a dedicated piece of gear for anyone looking to block 98% of UVA/UVB rays while staying comfortable in the waves.