ETHO 4 Pack Childrens/Boys Thermal Underwear Long Sleeve Vest 50% polyester 50% Viscose Pull On closure Boys Quality Long Sleeve Thermal Vest This Item Contains: 3 Boys Long 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