These thermals are cotton blends. Many kids’ styles use a 60% cotton / 40% polyester blend, while the men’s pieces list 59% cotton, 38% polyester and 3% spandex for added stretch and fit.
Construction varies by style: children’s options are described as single-layer knit, while some men’s pieces use a waffle knit. All are knit fabrics designed for layering as thermals.
Care instructions given for these items specify machine wash and tumble dry for everyday laundering.
The listings reference standard knit finishes and specifically note waffle-knit fabric for some men’s tops and pants alongside other knit textures.
Performance features include stretch for improved movement, moisture-wicking to lift sweat away, and odor-control technology in some men’s tops for fresher wear.