Features: The waterproof mattress pads are designed with a 2 channel alternating mode that provides relief from bed sores and ulcers caused by extended bed rest. This mode also promotes increased circulation and helps to relieve pressure spots, reducing stress on the user's body. Alternating air mattress with pump is about 114.96 x 35.43 inches/ 292 x 90 cm, this mattress is large enough to fit most standard beds. Besides, the mattress pad easily fits on an existing mattress or frame, making it a great addition to any sleeping arrangement. Specifications: Material: PVC Color: as shown in the pictures Size: 114.96 x 35.43 inches/ 292 x 90 cm Package includes: 1 x Bed sore pad 1 x Electric air pump Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.