The VSD provides excellent vestibular and proprioceptive stimulation because it allows controlled bouncing and vertical movement. It comes complete with two locking safety snaps and four industrial quality elastic loops—two single loops, each with a working load of 30 lbs., and two double loops, which have a working load of 60 lbs. per double loop. This setup provides a working load range of 30–180 lbs. You can add additional double loops in place of the single loops to increase your VSD’s capacity to 240 lbs.