PLEASE READ CAREFULLY Size: one size fits all face shapes and genders. Velcro strips can adjust the face strap and chin straps to your liking and preferred pressure level. The length of the entire face slimmer is 23.2” and 35.4” when stretched. If you have concerns with the size, please ensure to measure your head prior to purchasing. Material composition: 50% neoprene, 30% neylon, 20% polyester. Weight: the whole face shaper is only 1.2 oz. Quality: ReadyGoo ensures the use of quality materials in our products to provide the best experience to our customers. Scent: each chin strap has an appealing scent of perfume so you don't experience any discomfort of smelling textile materials. Package content: jaw slimming strap in a plastic wrap for protection, perfume, and card. Usage instruction: included on the backside of the box. Care instructions: included on the backside of the box. Additional items required: none. We recommend using our facial slimming strap in combination with a face slimming mask, diet, and physical activities to achieve greater results.