Introducing the most luxurious Bob-O-Pedic model to date: the Bob's Twilight™! This mattress absorbs excess body heat when too much is created and releases it again to the body when needed. While the cover feels cool to the touch the best way to describe this technology is that it's not too warm, not too cold, it's just perfect! Furthermore, my Power Bob Ultra adjustable base features multiple USB ports that add a tech-savvy spin to so you can charge your gadgets while you lounge in bed. With the touch of a button on the wireless remote, you can adjust the head and foot positions and more to fulfill your comfort needs.