This kayak cover is made of sun ray reflecting and waterproof polyester material, light and durable; UV resistant, waterproof and anti-dust; Protect your Kayak from the sun & snow & rain & dust damage. The annular elastic to paraphrase more convenient, Easy to operate without the need of any other tools. Roll and clip closure is adjustable for kayaks of 7.8ft-18ft length Easy On And Easy Of-The elastic draw string on it to pull it snug makes this UV resistant canoe cover go on and off easily and stays in place.