Ooler by SleepMe Chilisleep. Used only a handful of times. Like new. Fits 1/2 of a Queen size bed (so for 1 person, but I believe it will also fit a twin or 1/2 a full bed). Msrp $800 In less than 10 minutes, adjust your bed anywhere from 55F-115F! So much more effective and convenient and cost efficient than using Heat or A/C. Perfect for those sharing a bed, those who sleep cold or hot, perimenopause/menopause or autonomic disregulation. Cool down while sleeping with the OOLER, a water-based bed cooling system & mattress pad that regulates your bed's temperature for a restful night's sleep. Stop cover wars by adjusting your side of bed to whatever temp you are most comfortable at and enjoy! You can control temps from the base unit or via app and even set a “wake up” with warm temps or a biorhythmic schedule that keeps you toasty upon entering bed, chills to keep you restfully asleep, and then gently wakes you up by slowly heating up again. Compatible with power/adjustable beds.