Cramer's specially designed sports pack comes equipped with an adjustable strap to provide healing power anywhere on the body. Advanced Pearl Technology combines hot and cold therapy into one easy-to-use pack for convenient pain relieve after a sweat-inducing practice or hard-won game. The long-lasting temperature retains therapeutic healing powers for up to 20 minutes. The 7½"L x 4½"W pack can be re-used for both hot and cold uses to tend to pains, aches, bruising, or swelling.