Generous fit. Provides high performance protection from the elements. This sanded duck cover provides high performance protection from wind, rain, and snow. It has flex fabric from inside to outside along with water repellent. It was designed with bi-swing backs, articulated knees for superior mobility. Zip to mid thigh with storm flap. Articulated knee for ease of movement. Secure, deep chest pockets. Material: Cotton, Spandex.