The Surf Grass Mat™ is 29 oz. and 20 x 25 inches of high quality synthetic turf. The mat’s supportive and soft bristles of turf work to dust off any dirt, sand, or particles that may have accumulated on your feet and wetsuit while changing. Use the Surf Grass Mat™ before you get into your car or walk into your house for an instant clean feeling. The mat is extremely durable and easy to clean.