ETHO Childrens/Boys Thermal Underwear Long Sleeve Vest & Long Pants 50% Polyester & 50% Viscose Elastic closure Boys Quality Set Of Thermal Underwear - Vest & Long Pants These Thermals Are Fully Brushed For Extra Warmth They Are Made From A Winter Warm Material - Which Will Provide You With Ultimate Comfort This Set Of Thermal Underwear Is Ideal For Using As A Baselayer Underneath Clothing During Cold Weather Conditions/Sport Activies Machine Washable