Mabis Ice Bags are made of soft, flocked latex that gently conforms to the body's surfaces. Ice bags have been effectively and safely used for ages to relieve the pain of muscle sprains and strains. Therapists and doctors often recommend cold treatment to reduce swelling and help speed the healing of muscle sprains, surgery, bumps and bruises. This high-quality ice bag has a waterproof plastic cap that screws down tightly to prevent leaks. Available in large or medium sizes.