The ToughBuilt GelFit knee pads are suitable for smooth, clean surfaces both indoors and outdoors. They are ergonomically shaped to hug the knee and upper shin area, providing maximum pressure distribution for all-day comfort. The high sidewalls significantly reduce knee twisting. Elastic EVA straps stay comfortably in place without restricting circulation or pressing behind the knee. The ToughBuilt snap shells are easy to remove and replace. These knee pads are made from durable materials and a sturdy construction, featuring abrasion-resistant 1680D material.