Made of pliable rubber. Pull on design. Comes with a drawstring bag for traveling. Offers foldable option for packing. For fall and winter use, warm socks are recommended. Synthetic lining. Cushioned footbed. Flexible synthetic sole. Please keep in mind that the buckle on this boot is decorative and should not be used as an aid to pull the boot on. The brand advises that a white wax film may appear on the surface of the rubber boots and that it can be wiped off with a damp cloth. This "blooming"