Economical cold pack for your sore, swollen foot - the basics foot cold pack is designed for the shape of the bottom of your foot and back of your heel. The cold pack contains a sewn-in rigigel pack that cannot be changed or removed. This means the cold pack always stays in place to target the sore, swollen areas of your foot. The rigigel pack inside the basics cold pack conforms perfectly to the bottom of your foot. The gel pack is custom designed for the sole of the foot to provide you with superior coverage of the sore and swollen area. Using the basics foot cold pack is quick and easy because there's no need to insert or remove the rigigel pack - it's sewn in! rigigel technology - the basics foot cold pack contains 1 sewn-in rigigel pack. Our unique rigigel formula is soft and flexible at any temperature, yet unmoveable under pressure. Rigigel doesn't flow away to other parts of the pack when pressure is applied. While other gels will move under pressure, rigigel stays in place. This results in targeted, uniform coverage of the back of your foot and heel. Rigigel packs also have amazing cold capacity and contain more gel than ordinary gel packs. This means that the cold pack will stay cold longer so you won't have to re-charge it as often. Comfortable and easy to use - the basics foot cold pack is made of elasticized materials, allowing you to slip it on and off easily. Even the stitching is flexible, so when you move, the cold pack moves with you. The inner lining of the cold pack is thin and breathable, and there is no bunching or binding. It is incredibly soft, light and comfortable to wear. Using the cold pack is hassle-free because there is no adjustment required. Simply slip your foot inside the cold pack and pull it on for a comfortable fit. Using the basics cold pack - the basics foot cold pack can be stored in the fridge or the freezer. Place the basics cold pack inside the included storage bag before charging.