ETHO 4 Pack Childrens/Boys Thermal Underwear Short Sleeve Vest 50% polyester 50% Viscose Pull On closure Boys Quality Short Sleeve Thermal Vest This Item Contains: 4 Boys Short Sleeve Thermal Vests This Thermal Vest Is Fully Brushed For Extra Warmth - Will Also Provide You With Ultimate Comfort Perfect For Using As A Baselayer During Cold Weather Conditions - Ideally Winter Machine Washable