One unfortunate reality of running is sooner or later you are PROBABLY going to need an ice pack. You can go for the tried and true bag of frozen pees, or you can buy one of these icepacks. I bought 4 of these before my knee surgery and I LOVE THEM! They are an excellent size and the smooth gel allows it to wrap perfectly around your injured body part. I have used a lot of ice packs over the years and this is by far my favourite. Well worth the price.