High-Performance Compression for Active Boys: Our Youth Boys Sleeveless Compression Shirt is designed for youth athletes who love simple style. Made with compression fabric, this youth boys tank provides targeted muscle support for activities such as basketball, football, and baseball, helping to reduce muscle fatigue and improve performance Compression Fit for Boys: Designed with high-performance compression fabric, this youth boys' sleeveless compression shirt provides a snug yet flexible fit, ensuring optimal muscle support during sports like basketball, football, and baseball Quick-Dry & Moisture-Wicking: Made with breathable,four-way stretch, lightweight 85% Polyester,15% spandex fabric, this youth compression shirt features quick-dry and moisture-wicking technology, keeping your kids cool and comfortable during workouts or hot weather Tag-free: Featuring a compression and crew neck design for sports, this youth kids tank tops with smooth flat seams and a tagless design contribute to reducing abrasion and enhancing overall comfort Athletic Design: Ideal for sports and activities such as basketball,soccer,hockey, running, training, and swimming, this boys athletic tank top serves as both a workout essential and a base layer for any training,offers enhanced flexibility and comfort for all-day wear during sports activities Size and Fit: XS=US Size 5 (Height:43.3-45.2inch) /Small=US Size 6-7 (Height:47.2-49.2inch)/ Medium=US Size 8 (Height:49.2-53.1inch) / Large=US Size 10 (Height:55.1-57.1inch) / X-Large=US Size 12 (Height:59.0-61.0inch),Available in a range of sizes, including US Size 5-12, Its fitted design ensures comfort, making it perfect for big kids and teens