These Sanded Duck Overalls provide high performance protection from wind, rain, and snow. They have a flex fabric from inside to outside along with the DWR (Durable Water Repellency) treatment. They were also designed with bi-swing backs, articulated knees for superior mobility and zip to mid thigh with storm flap. Sanded Duck Overalls feature a double knee with cleanout bottoms to accommodate knee pads, secure, deep chest pockets and have a generous fit. Material: Cotton, Spandex.