Knee support using patented technology to promote blood circulation and support walking. - Brand: RKL - Product Name: Smooth Move Support - Size: Free Size (30-40cm) - Shape Type: Knee - Technology: Patented technology for blood circulation promotion I purchased three, two for 17,900 yen and one for 5,500 yen, for my mother who says her knees hurt. She tried one, but said she couldn't wear it every day due to her age, so I am selling it. It is said to help with unstable walking. Color: Black系 Stains, tears, odors, etc.: None