Boy’s Thermal Underwear Long Sleeve Athletic Base Layer Compression Underwear Shirt Tights Set

90% Polyester, 10% Spandex
Imported
Wrap closure
Machine Wash
90% Polyester, 10% Spandex, Fleece-lined
Smooth and soft polyester and elastane fabric ensures a pleasant and supple touch without irritation even with prolonged wear
Skin Compression Fit Support and wrap sports muscle groups, reduce the risk of injury, and helping blood circulation
Great for weight training, football, rugby, skiing, snowboarding, and all sports activities including walking & running
US Standard Size, if you have no idea, just please according to Height Choice.