Prototype Under Armour Blue Boy Shorts. Boys' shorts in a loose cut made of very light and smooth fabric, which wears out extremely quickly. This is aided by MTS technology, which promotes moisture removal to the surface of the material. Elasticated waistband with a lace to tighten. Side mesh pockets. Size YM (leg length from crotch): 21cm (+/- 3.5cm per size).Material: 100% polyester