Pro-Gamekeeper smock is easy to put on and take off The smock is enjoying a renaissance within hunting and outdoor apparel. Deerhunter’s Gamekeeper smock features a long waterproof zipper on one side, so it’s easy and convenient to put on and take off. With its Deer-Tex Performance Shell membrane, the smock is 100% wind and waterproof and breathable. Deer-Tex Performance Shell is a stretch membrane, which feels wonderfully flexible. The membrane comes with a five-year warranty.