Olgahexa Black Knee Supporter M Set of 2 Olgahexa is a 100% carbon fiber derived from plants. Its main effects are warming through powerful far-infrared radiation, improved blood circulation, deodorization, moisture control, and antibacterial properties (anti-mite and anti-mold). It is primarily used in POLA bedding and apparel as a material to improve cold sensitivity, relieve stiffness, and support comfortable sleep. - Color: Black - Material: Stretch material - Design: Knee supporter - Size: M I purchased these from POLA previously. I used them at first, but they ended up in the closet. I think they can still be used. I'm not using them now because my knees are feeling better, so I hope someone who needs them will take them!! Thank you for looking.