The base of the bag has a contoured low profile which eliminates a high wear spot at the outer edge. The back of the bag is reinforced with urethane Hypalon to protect from bolt heads and abrasion from the cage. Reinforced base and outer edges make this bag worthy of all the elements long distance touring can bring. To secure the Polecat it features a urethane coated daisy chain which easily fits plastic buckles and straps.