Boys UPF 50+ Rash Guard, Long Sleeve Cooling Swim Shirt for Kids

Engineered for Endless Sunny Play: Avensea UPF 50+ Cooling Boys Rash Guard At Avensea, we are dedicated to making every beach moment cooler and safer for kids. This long sleeve rash guard is crafted with 14 years of specialized expertise, featuring instant cooling fabric that keeps boys comfortable through every sun-soaked adventure. Better Cool with Instant Cool​ – our COOLMAX technology quickly pulls moisture away, spreads it evenly for balanced cooling, and uses rapid evaporation to maintain active breathability. The UPF 50+ fabric provides superior UV protection that works even when wet, blocks 99.9% of harmful rays, and is made for long hours of play—not just sun protection. Designed with 4-way stretch for full freedom of movement, it’s lightweight, quick-drying, and gentle on skin. Whether it’s surfing, swimming, or beach play, this rash guard is the trusted layer that keeps boys cool, dry, and protected all day long. Available in sizes for toddlers to teens, it’s more than a swim shirt—it’s peace of mind in every sunny moment. Choose Avensea, where innovation meets summer fun.

• 【UPF 50+ FOR LONG HOURS OF PLAY】- Built for beach days, pool play, swim lessons and sunny adventures, this boys rash guard helps keep arms, shoulders and back covered during long outdoor play. UPF 50+ fabric helps reduce UV exposure, even when wet.
• 【COOLMAX INSTANT COOLING FABRIC】- COOLMAX moisture-wicking fiber quickly pulls water and sweat away, spreads moisture evenly and supports evaporative cooling, helping boys stay cooler, drier and more comfortable from pool to playground.
• 【FRESHER PLAY, MORE PEACE OF MIND】- Polygiene freshness technology helps reduce odor after beach, pool and active play, while breathable cooling fabric helps boys stay dry and comfortable. Designed to give parents less worry during long sunny days, swim lessons, camp and travel.
• 【LYCRA 4-WAY STRETCH ACTIVE FIT】- Stretchy raglan sleeves and flexible LYCRA fabric let kids swim, run, splash, surf and fish without a stiff or restrictive feel. Easy to pair with swim trunks for beach, pool, vacation, summer camp and daily sunny wear.
• 【DURABLE & 6-MONTH SUPPORT】- Machine washable fabric and reinforced stitching are made for repeated summer use. If sizing, stitching or fabric issues arise within 6 months, we offer replacement support.