dod fitness Knee Donuts: support & comfort when kneeling The Original DoD Fitness Knee Donuts were designed for ANYONE who has knee discomfort while kneeling. Unique design. Not just a cushion- because DoD Fitness Knee Donuts support and prevent your patellas from touching the ground. Think about how often you kneel-when exercising, during physical therapy, yoga, Pilates, gardening, carpentry, around the house, giving the kids a bath, any time you knee. Support your knees. Protect your knees. Get on your knees and exercise, garden and kneel. Made in USA. Latex Free. Waterproof. Royal Blue. Lightweight. Easy clean with sponge.