Putting on and taking off these comfortable pre-race overpants is a breeze. The overpants can be removed with just one quick hand motion using the ingenious full length Parazip fasteners on both sides. Unlike old fashioned zip fasteners that only work when completely lowered, with Parazips, reaction time when necessary is extremely fast. The process can be completed almost instantly simply by raising the slider right to the top and pulling a tab either left or right.