1Hot compress therapy can expand local capillaries and accelerate blood circulation, thereby reducing pain and eliminating fatigue. 2Cold compress therapy can constrict local capillaries, play a role in heat dissipation, cooling, and relieving swelling. 3With soft plush on the other side, it helps to gradually adapt to the irritation of ice or hot compress, no need for towel or cloth wrapping. 4Gel pack can be used not only on the ankle, but also on the knees, wrists, elbows and other body parts. 5It can relieve soreness and discomfort and help to alleviate sports injuries for followup treatment.