The Coleman QuikBed 4-in-1 Airbed is multi-functional. Use each part separately as twin beds, zip together to make a king size bed that won't move apart or stack on top of each other to create a tall single bed. The two parts are held together by a zip and clip system. Both parts have double lock valves that make sure the air stays in. The top is soft and fluffy for a comfy night's sleep. And when you're done the wrap and roll storage system will let you stow it all away in no time. It's the perfect versatile air bed to have around for when friends stay over or you're heading off camping, sometimes with the family, sometimes with friends.