The ProFlex 350 Gel Foam Knee Pads are cushioned with NBR foam and EVA foam padding for all-around protection, support and stability. For long-lasting use on the toughest worksites, these pads are made with a 1680D ballistic nylon shell and an abrasion-resistant 420D nylon rubber cap. Featuring an abrasion-resistant 420D nylon-rubber soft cap, these knee pads offer tremendous grip without damaging delicate surfaces. A stretchable neoprene strap with large hook & loop closure securely attaches for an adjustable, snug fit on a variety of leg sizes. To further boost comfort, the strap is perforated to improve airflow and prevent sweat behind the knees. Ideal for all-day knee protection and comfort on a variety of worksites, including construction, HVAC, tiling, flooring, landscaping and more.