These are durable and reliable rubber wedges connected with a nylon rope and ready to use. If you are looking for it, stop wasting your time searching and buy it. If you are looking for cheaper and lighter weight plastic pads, take a look at the superior durability and grip of these rubber pads and then buy them. They had an odor when unpacked, but that dissipated after a few days outside. When exposed to sunlight, the rope can burn out and become brittle. Tell your children that when this happens in the year 2100, you will need to cut the old rope in half, thread the new one through the holes, and tie two knots to replace the rope. Another 100 years of service!