Features: Using thick fabric, it provides excellent insulation performances and effectively resists cold wind invasion. Suitable for activities such as running, cycling, gym training, commuting and more in cold weather. Humanized tailoring, perfectly fitting the knee, ensuring without pressure during long-term wear. Light in weight design, easy to fold and store, portable without taking up space. Durability and wear-resistant, suitable for frequent use without easy damage, all can effectively protect the knees. Specifications: Component: Polyester fleece fabric composite, heating component, fluff Size: 51cm/20.07inch, standard size design, suitable for most adults. Color: black, gray(optional) Type: fleece-lined type, heating type(optional) Practicality: It is especially suitable for winter outdoor sports, running, cycling and other activities. It is windproof and warm, effectively protects the knees from cold, while supporting joint movement and reducing the risk of sports injuries. Package Includes: 1Pc Windproof Sports Kneepad note: The picture shows two sides of single product, not two products. Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.