These resistance products are ideal for encouraging more normalized motor responses and help organize sensory information. Each pillowcase-like sac is made from 4-way stretch translucent Lycra with reinforced Velcro (xsmall/small) or snap closure (medium/large/xlarge). Body Stretch Bags are designed specifically for spatial awareness through balance and resistance. Since they are translucent, they can see the shapes they are making. Available in red,lime green, blue, )