The Caldwell Deluxe Universal Medium Varmint Front Rest Filled Bag is made of high-quality leather and polyester. This innovative front bag is designed to function with most brands of front rests. The exclusive hook and loop tabs on the front rests allow quick installation and removal from the cradle without time-consuming need to lace them on. The leather gives you a secure rest and the polyester, which will not stretch or sag, allowing the bags to hold their shape. This combination makes for the best shooting bag on the market.