I purchased this and was going to have it custom-made at the animal hospital right away, so it's new and unused, stored at home. New product! > Dog Supporter with Built-in Springs, X-shaped Belt, Front and Hind Legs, Left and Right, Shot, Small Dogs, Medium Dogs, Large Dogs, Joint Supporter, Joint Protector, Knee Supporter, Joint Protection, Senior Dog Care, Nursing Care Supplies, Elbow Pads 2 pieces of size S Features: Joint Protector, Dog Knee Supporter, Shot Type 【Fits the Knee】 This supporter securely fixes the knee while ensuring breathability. The outside is firmly secured with 4 strong Velcro straps. It fits the knee without constriction. 【Supports with 2 Springs】 Two special springs, one on each side, for a total of two, firmly protect the knee. It smoothly supports the bending and stretching of the knee. 【Moderate Breathability】 The knee supporter balances breathability and heat retention. Numerous holes in the skin-friendly fabric release excess heat, preventing stuffiness and rashes caused by sweat. 【Active in a Wide Range of Situations】 ・Prevents licking or biting of wounds on the legs ・For catheter protection ・Supports weakened joints and muscles ・Reduces pain for dogs with joint inflammation ・For cold protection ・Prevention of bedsores