This is a very comfotable mattress due to the combination of materials used to make it. The outer cover has a very luxurious outer quilt which will keep the mattress nice and breathable. The cover is very soft and plush which adds comfort your whole body. The waveless bladder choices are the most popular choices and they are filled with layer of contour baffles that will contour to your body and reduce movement. The extra in the mid section will help your body sink into the mattress more level which is a big plus compared to a lot of the mattresses available today at triple the cost. The digital heating system can be set to the exact desired temperature and it is very easy to use. Our local customers have been very pleased with this mattress and now our amazon community if giving us high ratings for this quality mattress. Also just so you know this advertisement is for a complete mattress. The foundation which looks like a box spring is Not Included. This mattress needs to be placed on a stroung flat surface. If you need a base or if you have any questions just click contact seller through Amazon. When ordering just send us message though amazon to let know which bladder you would like with your new mattress, These are you choices. Free Flow, Semi Wave, 80% , 90%, 95% or 99% Waveless.