Meet the quintessential beanie. Made from seawool, with an adjustable fold line, the Nep Beanie is warm and stylish, a heathered texture, and an allover rib that stretches it to fit any dome. 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.