Boom Basic Knee Pads Purple S are constructed from high-quality and durable materials, providing strong resistance to wear and abrasion. These knee pads are padded on the inside to ensure comfort even during extended periods of use. The top sliding surface is made of hardened plastic, making them well-suited for activities in skateparks, on the street, and on ramps. They are designed for both adults and children, and are ideal for various activities including bikes, BMX, boards, and scooters.