Comfcube elbow ice pack uses patent ice boxes design to stay cold for 2 hours, and keep a comfortable cold temperature without causing any frostbite.omfcube elbow ice pack is made of super soft fabric, and combined with multiple individual ice cubes for evenly dispersed cooling and snug-fit to the shape of your elbow, forearm or wrist.Slip-on Design means no messy wraps or inserts or awkward band, You could wear it in seconds with ease. Comfcube ice pack entirely wraps around the elbow to forearm areas provides 360° compression cold therapy.Comfcube ice pack is multifunctional and ideal for elbow, wrist, calf, arm. Targeted relief for tendonitis, tennis elbow, golfers arm, arthritis, soreness from heavy-duty and post-workout recovery. A great gift for people who play basketball, tennis, golf, run or climb.