RockTape's Assassins Crossfit Knee Support Sleeves provide support, compression and warmth to your knees during any activity, from cross training to weightlifting to running. These knee support sleeves are available in both 5mm or 7mm thickness. The 5mm thickness is great for general workouts and WODs. 7mm is ideal for those who exclusively weightlift or need extra support due to knee pain. They're made from high quality material and are extremely durable. The 5mm thickness is great for general workouts and WODs. RockTape's Assassins Crossfit Knee Support Sleeves are always sold as a pair. You have two knees, so you deserve two sleeves!