(Image credit: Tempur-Pedic)

In summer my bed turns into a heat trap and with heatwaves on the horizon, I'm dreading nights of sweaty sleep. A new mattress isn't on the cards so I'm looking into an affordable solution and the Tempur-Pedic Tempur-Adapt + Cooling mattress topper, now $309 for a queen (was $429) with code TOPPERS at Tempur-Pedic, might be the perfect choice.It's the number one pick in our best mattress toppers guide and our tester described sleeping "cool and dry" throughout the review period (despite some weather fluctuations.) It's also easy to clean, which is a plus for anyone worried about night sweats.To get your hands on this sale you'll need to use our secret code TOPPERS — enter it at checkout to claim your discount on the Tempur-Adapt + Cooling.We are hoping to see more mattress topper deals in the upcoming Amazon Prime Day mattress sales, if you don't mind sweating it out for another week. But I'm not sure we'll see anything to top this discount — pardon the pun — if you want to save your sleep this summer.Why you should buy the Tempur-Pedic Tempur-Adapt + Cooling mattress topper1. It's coolingThe Tempur-Pedic Tempur-Adapt + Cooling mattress topper features a moisture wicking cover made from 'cool-to-the-touch' performance fabric, to prevent heat from pooling during the night.Our tester credits the topper with helping her sleep through some unseasonably warm weather, and she never woke up sweaty or kicking off the covers.If your mattress turns into heat trap in summer, simply spread out the topper to add a cooling boost to your bed for a fraction of the price of the best cooling mattresses.2. It's washableLet's not beat around the bush — sweaty summer nights are bad news for your mattress. There could be as much as a bath tub full of sweat in your bed after a long summer.