A sustainable classic for men. Crafted from innovative Seawool, a yarn made from oyster shells and upcycled plastic bottles, this popover is warm yet breathable. Its multi-knit construction showcases a jersey body and textured yoke, creating a cool and classic look that fits true to size. Seawool Seawool is a sustainable fabric that's built to last using recycled plastic bottles and oyster shells. Seawool is warm yet breathable, and has natural antimicrobial properties that keep it from developing a smell. Seawool is static resistant, ridiculously soft, and looks great with just about anything.