Our Harmony ICE Handheld Massage Rollers features an easy grip and multi-directional rolling head. High quality, food grade stainless steel (304). Insulating gel maintains a cold, comfortable temperature. Perfect for on-the-go muscle maintenance and relaxation. A must have massage tool that combines deep, targeted pressure and therapeutic cold application. Hot to Use: Place in freezer or cold area for at least two hours before a repairing massage. For a relaxing warm massage, place roller ball in a bowl of warm water for 5-10 minutes before use. Place a few drops of desired massage oil for a smooth and easy glide. COLORS MAY VARY Our Harmony ICE Handheld Massage Rollers features an easy grip and multi-directional rolling head. High quality, food grade stainless steel (304). Insulating gel maintains a cold, comfortable temperature. Perfect for on-the-go muscle maintenance and relaxation. A must have massage tool that combines deep, targeted pressure and therapeutic cold application.