On Your Knees Bondage KitThis sexy restraint kit contains everything you need to keep your sub on their knees where they belong. The included collar is attached to each of the 4 cuffs by snap hooks and tethers, keeping them in a prone position. The nylon tethers will force them to stay kneeling and are adjustable up to 31 inches. The cuffs and collar are made from comfortable, all man made materials, for a cruelty free and vegan friendly bondage experience. Adjustable Velcro