I'm a very warm and light sleeper but this changes everything. I'm always waking up in the middle of the night uncomfortable and hot and this has helped me tremendously. It's like having a cooling effect. It's made of a quality material and fits a deep mattress. It stays cool to the touch and very smooth. It provides a soft layer of comfort and the underside is waterproof so an added bonus. The price cannot be beat especially since I didn't want to pay for a new cooling mattress just yet. This is the perfect sub until I save up for a new hybrid cooling mattress. I've washed the protector several times and it's held up beautifully.