I had an older memory foam that I stopped using long ago because of night sweats, I was skeptical prior to purchasing this, but desperate for a good comfortable bed, I searched for months before choosing this one, 1st, I liked the density, 2nd, I like the concept of egg crate and gel together for a cooler bed, I used a mattress cover over this and it has not disappointed, will be getting 100% cotton sheets for an even cooler bed, Yes, it is slightly warmer than no topper at all, but the trade off is worth it because with my aches & pains I am sleeping comfortably, and feel like royalty in my bed now!