The Heavyweight T-shirt is produced in a custom-developed heavyweight jersey fabric, the result of years of development. The knit is made with long-staple, ring-spun and combed cotton yarn, providing both incredible softness and durability. Nearly double the weight of Knickerbockers regular T-shirt, the tightly knitted construction creates a drape with a more boxy silhouette. The collar is finished with a double-needle mounted construction, a nod to the vintage sportswear tees we’ve always appreciated. 100% cotton, 10 oz. jersey from Portugal. Made in Portugal. Wash on cold. Tumble dry low.