Features & Benefits 4-way elastic material with custom-cold packs provides cold compression and stability of muscles, tendons and ligaments. Ideal for acute and chronic injuries. Includes 2 reuseable, and removable, custom-cold packs designed specifically for targeted pain relief. Comfortable, form-fitting. Stay active while wearing. Easy-on, easy-off. Simply place entire sleeve in the freezer. Fits left or right. Content: 79% Nylon /12% Elastane / 7% Polyester / 2% TPU