According to the manufacturer, these weights are soft, flexible, weighted, neoprene covered, 28-inch barbell-style tubes that wrap around the body. Soft, nylon end-stirrups may be used as handles for upper-body exercises, positioned around feet for lower-body exercises, or buckled at the ends for placement around the waist or over the shoulders. Available in 12 lbs, 15 lbs, 20 lbs, 40 lbs, 50 lbs. Instruction sheet included.