The CLC G361 Professional Ultraflex Gel Kneepads feature a unique design that has a soft outer shell with an accordian-style upper cap, high density, closed-cell foam and gel foam padding, and synthetic rubber straps, which all combine for enhanced comfort. The "Comfort Zone® gel center provides maximum cushioning providing maximum comfort all-day use. The G361 Kneepads are very soft, with a flexible outer shell that protects and grips most surfaces without causing damage like scratching or scuffing. Applications include Tile Setting, Masonry, Roofing and Concrete Forming.Heavy-duty construction throughout. Heavy plastic caps for easy knee swiveling. Thick foam padding for all-day comfort. Slide buckle style fastening system with adjustable straps for convenience and fit. One size fits all.