Suitable for leg circumference 41~52cm 1. COMFORTABLE AND FLEXIBLE: Soft lining and durable EVA foam padding keep your knees working for hours. The stretchy and flexible fabric provides ultimate comfort during every activity. 2. Adjustable Shoulder Straps and Anti-Slip Design: Adjustable Anti-Slip Easy Velcro Fastening System Provides a Secure Fit and Fits All Day Comfort. Easy to put on and take off. In addition, the knee area has a non-slip silicone strip, which is not easyto slip. 3. WIDE USE: Kneepads will not slip, roll, mark or damage surfaces when working on roofs, laminate or hardwood floors, vinyl, concrete or tile floors, and other smooth surfaces during a roofing or floor installation project. It can also be used for dance,volleyball, basketball, football and other activities. 4. One Size Fits All: Ultra-light, provides freedom of movement. Note: The size of this product is too large and is not suitable for more people to use. Please check the size on the picture to compare and choose the right product for yourself. 5. Durable: The high density and durable foam knee pads are designed to withstand rocks, gravel and moisture, so the knee pads will not deteriorate. The pad absorbs very little water, but it dries quickly.