Inspired by the heavyweight thermal “waffle” knit undergarments worn from the 1940s through the 1960s, our Toughnit Thermal draws from a tradition of everyday base layers built for warmth, durability, and repeated wear. Many of the vintage garments we reference were made in Pennsylvania, the same region where this piece is knit and sewn today. Made from 100% cotton thermal knit with a substantial 285 GSM weight, it carries the textured character and natural breathability of the originals. Designed with flat-knit rib cuffs for added durability and a secure fit. Fit (Classic): Classic fit with an easy silhouette designed for everyday wear and layering. - Model is 6". He wears a Medium top and 31" bottoms. Fabric (100% cotton): 100% cotton. 16/1 thermal knit with 16/1 1x1 rib. 285 GSM. Reactive piece dyed and rinsed. Knit and sewn in the USA. - Machine wash cold, tumble dry low. - Made in USA. Learn more. Returns (365 days): We accept returns and exchanges within 365 days of purchase as long as the products are still as good as new with original tags intact. Come by the store for a free on-the-spot return or exchange. If you’d rather return by mail, please note the $8 deduction to cover handling costs. Due to our commitment to delivering the best experience to our customers, we are unable to accept returns of shoes that show signs of wear or damage. We appreciate your understanding in this matter.