This queen size 90% waveless waterbed mattress is very popular due to how comfortable it is. It has about 5–6 seconds of movement which less than a free flow or the basic 1 or 2 layer semi wave wave mattresses. It has four Layers of super soft 2 oz. Resin Bonded Fiber Specially engineered for comfort.. One 2 Oz. Layer of Lumbar contouring Support Aides in lower back support which will help keep your body more level while resting. It also has sturdy L Sure Seam Corner Construction with *Reinforced Corners Provides durability and helps keep the sheets more stationary. All the fiber is connected together to help prevent shifting and sliding when draining. Mattress also comes with a fill kit and a 4oz bottle of premium conditioner. Water Mattress has a Lifetime Prorated Warranty and all the items are made in the U.S..We ship quickly. If you have any questions feel free to contact us. Thank-you for looking at our products. Mattress Covers Amazon Store