The COS design team revisited our classic bucket hat this season, tweaking the fit for a more rounded shape. It's crafted from a matte nylon blend on one side and 100% cotton-twill on the other; since it's fully reversible, you can switch between the black and dark-green colors depending on your outfit- Reversible- Recycled nylon reduces our demand on limited natural resources and reduces greenhouse gas emissions Outer: 44% Recycled polyamide (Recycled nylon), 31% Polyamide, 25% Organic cotton, Inner: 50% Cotton, 50% Recycled cotton Circumference: S/M: 22.83", L/XL: 23.62"