The Simple Solution is small, discreet, and easy to use.Kit comes completely assembled and ready for use. No mixing or refrigeration required. Adjustable elastic belt accommodates up to a 48 inch waist extensions available). Can be heated multiple times, two heat pads included in kit. Accurate and easy to read temperature strip. Only the best available vinyl and components are used to insure against leaks. Durable vinyl bag pre filled with 3.5 ounces of sterile, toxin free synthetic sample. Our sample has all the same characteristics and properties as a real human sample. Our sample has the most realistic color on the market, no bright or fluorescent yellows. The Simple Solution is a true unisex kit, can be used by male or female.