Nike breathe hypercool vest junior boys the nike breathe hypercool vest is designed with dri fit technology and nike dry fabrics to allow sweat to move away from your body quicker leaving you cool and dry its lightweight block coloured design is crafted with flat lock seams to promote a comfortable fit that prevents skin irritation and chafing to body even when friction occurs its sleeveless design is coupled with a crew neck and a large printed nike swoosh to the front of the chest to co