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.