Hat: 100 % polyester (100% recycled) Lining: 100% polypropylene Core filling: Polyethylene plastic Buckle: Acetal plastic The fabric in this product contains recycled polyester from ocean-bound plastic picked up from areas up to 50 km inland from our coastlines, which helps reduce the pollution of waterways and oceans. The adjustable chin cord holds the hat in place when it’s windy, but is also detachable. Dries quickly – perfect if the hat ends up in the water when you’re swimming or out on the paddleboard. The lightweight hat protects the face and neck from the sun's rays.