Skin Gym Cryo-Ice massage sticks. 100% stainless steel. Application: refrigerate for up to 5 minutes for an extra-cooling effect. Use on clean, damp skin. Apply a serum to create a slip to avoid unnecessary pulling on the skin. Massage in upward and outward motions. Repeat each motion 3-5 times or as needed. Skin type: suitable for all skin types. For hygiene reasons, this product cannot be exchanged or refunded, unless faulty.