ActiveWrap® Pro 2-4 Hour Hip Ice Wrap w/ One (1) 10"x10" Long Duration Gel PackActiveWrap Pro Long Duration 4+ Hour Hip Ice Wrap The Long Duration Hip Ice Packs that come with the ActiveWrap Post Op Ice Wraps are designed as an alternative to more expensive ice therapy machines or cold machines used following surgery. These knee ice machines are often rented or added to your bill at time of surgery. Our long duration ice packs are portable and have been rated as the top performing ice pack in independent physical therapy testing