Only Boys long underwear is made of a strong cotton/poly blend that is easy to wear under clothing for extra warmth during cold winter months. Built for performance and comfort, these thermal long johns will not restrict movement while playing outdoors. Your little boy will stay warm while out in the elements or lounging around the house. Super Cozy temperature regulating material with a full cut crew neck can also be worn as pajamas on a chilly night.Quality Manufactured waffle weave shirt and pants with strong seams and ribbed cuffs will keep the heat in and the cold out.Toasty Base Layer wicks moisture away from skin to keep your child warm and dry.Cold Weather Apparel provides a snug fit that moves freely for outdoor activities like skiing, snowshoeing, and hiking.Easy Care – Simply machine wash and dry; Please Reference the Variations for all Available Sizes and Colors. Only Boys Offers Premium Clothing at Affordable Prices because we value every customer that visits our listings! Stop by Our Storefront to See the Rest of Our Great Deals; we’re confident you’re going to find items that anyone who needs boy’s clothing will absolutely love and adore! Thermal Underwear Set Thermal Underwear 2 Sets Ultra Soft Fleece Thermal Base Layer Set Ultra Soft Fleece Thermal Base Layer 2-Sets See Details See Details See Details See Details Customer Reviews 4.4 out of 5 stars 872 4.4 out of 5 stars 1,326 4.7 out of 5 stars 586 4.7 out of 5 stars 586 Base Layer Type Long John Waffle Thermal Long John Waffle Thermal Ultra Soft Fleece Ultra Soft Fleece Full Sets 1 2 1 2 Ribbed Cuffs ✓ ✓ ✓ ✓ Moisture Wicking ✓ ✓ ✓ ✓ Functional Fly ✓ ✓ Fabric Content 60% Cotton/40% Polyester 60% Cotton/40% Polyester 92% Polyester/8% Spandex 92% Polyester/8% Spandex