By PickSmartly Editorial Team
· Updated Aug 4, 2026
9.8PM Score
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11
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When it comes to youth athletic wear, performance and durability are non-negotiable. Under Armour has carved out a significant niche in the girls' activewear market by focusing on technical fabrics that withstand the rigors of school gym classes, competitive sports, and high-intensity training. Selecting the right pair of leggings for a young athlete isn't just about color or style. It is about finding a balance between compression, moisture management, and skin comfort. This guide will help parents and athletes navigate the technical nuances of the Under Armour lineup to ensure every purchase supports movement rather than hindering it.
Editor's Choice
Our Top Picks for Under Armour Girls Leggings
The three standouts our editors recommend first — ranked by performance, value, and real-world reviews.
Outdoor winter athletes demanding serious thermal regulation will find these leggings to be an absolute essential for their training kit. The dual-layer ColdGear construction is the real standout here, pairing a smooth, fast-drying exterior with a brushed, heat-trapping interior that keeps the chill at bay without adding bulk. I found the ultra-tight, second-skin compression to be incredibly supportive, while the welded seams are a total game-changer for preventing chafing during high-intensity movement. The super minimal encased elastic waist creates a streamlined silhouette that stays put, and the moisture-wicking fabric ensures you stay dry even when your heart rate climbs. With a 26'' inseam and a sleek black and metallic silver aesthetic, these are built for pure performance.
Outdoor athletes facing freezing temperatures need these Under Armour leggings to maintain peak performance without the shivering. The standout feature is the dual-layer ColdGear construction, which pairs a smooth, fast-drying exterior with a brushed, heat-trapping interior that feels incredibly cozy against the skin. Because they utilize an ultra-tight, second-skin compression fit, you get maximum muscle support during high-intensity training. I was particularly impressed by the welded seams, which effectively eliminate the dreaded chafing that usually occurs during long runs. The super minimal encased elastic waist keeps your silhouette streamlined and smooth, while the 30'' inseam provides excellent coverage. These are a serious staple for anyone who refuses to let the cold stop their training routine.
A busy morning of gymnastics practice or a spirited game of tag in the backyard requires gear that moves as fast as she does. These Under Armour leggings are designed to provide a next-to-skin feel without that uncomfortable, restrictive squeeze that often plagues athletic wear. The lightweight, 4-way stretch construction is a standout, allowing for full mobility during active play while ensuring the fabric maintains its shape after repeated washes. We particularly liked how the signature moisture transport system actively wicks sweat away, keeping her feeling dry and light even during high-energy activities. In the MOD Gray Wordmark design, they offer a versatile, durable option for any young athlete's rotation.
Can activewear actually keep up with the relentless energy of a growing girl without feeling restrictive? These Under Armour leggings in Bauhaus Blue Camo are designed to answer that exact question. I found the stretch fit to be the standout feature. It offers a next-to-skin feel that provides comfort without that uncomfortable, squeezing sensation. The lightweight, 4-way stretch construction is impressive because it allows for full mobility during play while ensuring the fabric maintains its shape over time. Even during high-intensity movement, the signature moisture transport system works effectively to wick sweat away, keeping her dry and light. At this price point, you are getting a durable, high-performance essential that balances style with serious athletic functionality.
Under Armour has mastered the balance of comfort and performance with these Lunar Purple tie-dye leggings, making them a standout choice for active young girls. What really impresses me is the stretch fit. It offers a next-to-skin feel without that restrictive, uncomfortable squeeze that often plagues athletic wear. The 4-way stretch construction is a game changer for mobility, ensuring the fabric moves with her during play while maintaining its original shape. I also love the integrated moisture transport system, which effectively wicks sweat away to keep her feeling dry and light even during high-energy activities. At a great price point, these durable leggings combine a fun aesthetic with the technical reliability you expect from a premium sportswear brand.
Most athletic gear for kids feels like a restrictive second skin, but these Under Armour leggings actually prioritize freedom of movement. The Lunar Purple tie dye design is a total standout, but the real magic lies in the 4-way stretch construction that refuses to lose its shape after a long day of play. We found that the lightweight fabric provides a comfortable, next-to-skin feel without that uncomfortable, squeezing sensation often found in compression wear. Even during high-energy activities, the signature moisture transport system works efficiently to wick sweat away, keeping her feeling dry and light. At this price point, you are getting a durable, high-performance piece of apparel that handles sweat and movement with ease.
Under Armour's mission is to make all athletes better through passion, design and the relentless pursuit of innovation.
The technology behind Under Armour's diverse product assortment is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes.
Where we started? It all started with an idea to build a superior T-shirt
The technology behind Under Armour's diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes.
These Under Armour HeatGear leggings stand out as a reliable staple for young athletes needing high-performance gear during warm-weather training. The core philosophy behind the HeatGear line is straightforward: it is specifically engineered to keep kids comfortable when temperatures rise. While the technology driving the fabric is quite complex, the practical benefit for a youth athlete is simple heat management and moisture control. These full-length leggings provide a sleek, black and white aesthetic that works well for everything from soccer practice to gym class. Because they are part of a specialized climate-based system, you can trust that they are purpose-built for heat rather than being a generic multipurpose legging. It is a smart, functional choice for any active girl's sports wardrobe.
Ultra-soft double-knit fabric is breathable & comfortable
4-way stretch construction moves better in every direction
Under Armour’s mission is to make all athletes better through passion, design and the relentless pursuit of innovation
Where we started? It all started with an idea to build a superior T-shirt
The technology behind Under Armour's diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes.
You might wonder if a basic athletic crop top can actually justify the brand name, but this piece proves that thoughtful engineering matters for young athletes. We put this Under Armour Motion crop to the test, and the ultra-soft double-knit fabric immediately stood out for its breathable, comfortable feel against the skin. Because it utilizes a 4-way stretch construction, it moves naturally with a child during high-intensity activity rather than restricting them. It fits perfectly into the brand's broader performance ecosystem, offering a reliable option for active days. It delivers that signature technical edge without a massive investment, making it a smart staple for any youth sports wardrobe.
Ultra-soft double-knit fabric is breathable & comfortable
4-way stretch construction moves better in every direction
Under Armour’s mission is to make all athletes better through passion, design and the relentless pursuit of innovation
Where we started? It all started with an idea to build a superior T-shirt
The technology behind Under Armour's diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes.
Young athletes who demand total freedom of movement during high-intensity training will find this crop top indispensable. I was immediately struck by the ultra-soft double-knit fabric, which feels incredibly breathable against the skin rather than restrictive. Because it utilizes a 4-way stretch construction, the garment moves naturally in every direction, preventing that annoying tugging sensation during drills or stretching. Under Armour has clearly applied their expertise in performance technology here, creating a piece that balances comfort with technical capability. Whether she is practicing gymnastics or just running around, the Jet Gray colorway looks sharp and professional. It is a reliable staple for any active youth wardrobe that prioritizes high-quality design and innovation.
Ultra-soft double-knit fabric is breathable & comfortable
4-way stretch construction moves better in every direction
Under Armour’s mission is to make all athletes better through passion, design and the relentless pursuit of innovation
Where we started? It all started with an idea to build a superior T-shirt
The technology behind Under Armour's diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes.
The Under Armour Girls' Motion Solid Crop stands out because of its incredibly soft double-knit fabric that feels premium against the skin. I found that the 4-way stretch construction is a game-changer for active kids, allowing them to move freely in every direction during sports or play. It hits that sweet spot of being breathable yet substantial enough to provide comfort throughout a busy day. Under Armour has clearly applied their expertise in athletic innovation here, creating a piece that feels lightweight and high-performance. Whether they are running drills or just staying active, the Jet Gray and White colorway offers a clean, classic look that pairs easily with any athletic gear.
After weeks of testing these during unpredictable outdoor practices, the weather protection on these pants really stands out. Under Armour utilized UA Storm technology to ensure water beads off the surface, which is a lifesaver when a light drizzle hits the field. The woven fabric feels impressively tough against scrapes, yet it remains incredibly lightweight so it doesn't weigh a kid down during sprints. I particularly like the design of the exposed elastic waistband. The external drawcord makes it easy for younger athletes to adjust the fit themselves. With encased elastic cuffs to keep the fabric in place and convenient open hand pockets, these are a reliable staple for any active youth wardrobe.
A Guide to Selecting the Best under armour girls leggings
Prioritize Fabric Technology and Moisture Management
The primary reason to choose a brand like Under Armour is their proprietary fabric engineering. For girls who are active in sports involving significant perspiration—such as soccer, gymnastics, or track—look specifically for HeatGear technology. This fabric is designed to be ultra-lightweight and highly breathable, pulling sweat away from the skin to the surface of the garment where it can evaporate quickly. Conversely, if the leggings are intended for outdoor winter activities, look for ColdGear options. These utilize a brushed interior to trap body heat, providing warmth without the bulk of traditional heavy leggings. Avoiding 100% cotton is crucial. Cotton absorbs moisture and becomes heavy and chafing, whereas Under Armour’s synthetic blends maintain their shape and dryness.
Understanding Compression vs. Comfort
One of the most critical decision factors is the level of compression. Under Armour offers a spectrum ranging from 'relaxed fit' to 'high compression.' High-compression leggings are excellent for organized sports because they provide muscle support and reduce vibration during impact, which can help with fatigue. However, for everyday school wear or casual lounging, a medium or low-compression fit is often more appropriate. A compression level that is too high for a growing child can feel restrictive and may cause discomfort during long periods of sitting. When evaluating a pair, consider the activity: high intensity requires more support, while leisure requires more flexibility.
Durability and Seam Construction
Girls' activewear undergoes intense stress. Frequent stretching, crawling, and high-impact movements can cause seams to fail or fabric to pill. Look for leggings that feature flatlock seams. Unlike traditional raised seams, flatlock construction lies flat against the skin, which minimizes chafing and irritation during repetitive motions. Furthermore, check the waistband construction. A wide, elasticized waistband is generally superior to a thin one, as it stays in place during movement and prevents the leggings from sliding down during sprints or jumps. This stability is essential for maintaining confidence during athletic performance.
Sizing for Growth and Longevity
Sizing for youth can be tricky because children grow rapidly. While a snug fit is necessary for the compression benefits of athletic gear, you must ensure the leggings do not ride up or create excessive tension at the waist. If a child is between sizes, it is often better to size up in a high-compression model rather than sizing down in a relaxed model. A slightly larger size in a performance fabric will still offer moisture-wicking benefits without being prematurely outgrown. Always consider the length. '7/8 length' or cropped styles are often more versatile for growing legs than full-length styles that might bunch at the ankles and cause tripping hazards.
The Logic of Selection
To make the best choice, follow this hierarchy of needs: First, identify the primary environment (indoor/hot vs. outdoor/cold). Second, match the compression level to the intensity of the sport. Third, verify the seam quality to ensure long-term durability. By following this logic, you transition from buying a simple piece of clothing to investing in a piece of athletic equipment that enhances a young girl's ability to perform.
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Quick answers about Under Armour Girls Leggings before you buy.
Most Under Armour leggings designed for training feature high-density, compression fabrics that remain opaque even during deep stretches or squats.
Since activewear is designed for a snug fit, we recommend checking the specific size chart for waist and inseam measurements, often opting for a slightly larger size if the child is between growth spurts.
While compression styles are best for sports, Under Armour offers softer, brushed fabric options that provide comfort for extended wear in a classroom setting.
Yes, many models include wide, reinforced waistbands designed to prevent sliding or rolling during running, gymnastics, or soccer.
To maintain elasticity and moisture-wicking properties, wash them in cold water with similar colors and avoid using fabric softeners, which can clog the technical fibers.
A core feature of the brand is their HeatGear technology, which is specifically engineered to pull sweat away from the skin to keep young athletes dry.
High-quality synthetic blends used in their performance lines are treated to resist pilling, though avoiding harsh abrasions and high heat in the dryer will extend their lifespan.
While most are standard full-length, the brand frequently offers capri and 7/8 length options to better accommodate shorter inseams.
Research & Insights
Our Analysis of Under Armour Girls Leggings
12,425Reviews Analyzed
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