The Big Chief hunting waders are 100% waterproof and made of ozone-resistant and scent-free premium rubber with nylon lining for easy on/off. An adjustable internal calf harness ensures a proper fit while a removable EVA footbed offers cushioning comfort. The Ankle-Fit design reduces slippage and provides a better fit and walking comfort. 600 G. Thinsulate Ultra Insulation. for colder environments.