My daughter is a competitive swimmer and has had some knee pain recently. It is hard to get the cold therapy on her knee with a full size ice pack, and flat ones don't shape nicely to her knee.This is on the large side but with the velcro straps can be adjusted for size. Although the box says it can be used for heat therapy, recently the ones I have tried leak when heated so we have stuck to cold therapy. This works well when chilled in the fridge, or put in the freezer for short periods of time prior to use, but if left in it will freeze solid like other gel packs.This has a lot of flexibility in that it can be used on shoulders, lower back, etc. You just have to figure out how to adjust the straps. She finds it not as comfortable as packs that are designed specifically for knees (the ones with the holes in the kneecaps) but likes the flexibility that it offers.This arrived nicely boxed and I think would be a great gift for the athlete in your life. Definitely giftable packaging.