Lightweight, soft & durable foam rubber cushions for protecting knees or seat * 13mm thickness puts comfort between you and floor, ground, concrete or other surfaces * Set of four 7" x 15" pads, one-each in blue, green, yellow & red * Can be rolled, curled or stacked for storage - pop back into shape; individual weight just 0.7 oz * Great for child or adult - gardening, car repair projects, school, sporting events