Very nice. is it like memory foam or something? also, if you want like sweat and stuff to be absorbed, cut up an old like flannel shirt and tie it onto each piece of foam. or if all else fails, just stick a fan in there lol. Oh and if your looking for like an undersuit type material, if u have a like michaels or Joanne Fabrics, its a black vinyl, i think it's called like pleather or something, or just black vinyl. it's like 4.99 per yard and its like 4 feet (wide?) and so really you get like 12 sq ft for like 5 bucks.