Cool Relief. Comfortable Recovery. The CopperFreeze™ Arm Sleeve delivers targeted cold or heat therapy to help reduce inflammation, ease muscle soreness, and support recovery in your upper or lower arm. Designed with flexible hydrogel that stays soft even when frozen, it molds comfortably to your arm for full-contact relief — no dripping ice packs or bulky wraps. The copper-infused fabric adds odor control and all-day comfort.