The seams of the mattress had variation from 1mm to 4mm, having an impact for the durability of the mattress, meaning the construction is not adequate or at not least correspond what could be expected from 85USD mattress. For 20USD matress this kind of quality variation in the seams would be acceptable, but for 85USD mattress I would expect more. I asked clarification about the material which is described somewhat unclear, this is the response I got from Naturehike: "The factory is described like this: Outer layer of TPU nylon fabric, inner layer of TPU sealing coating"
related seller very good product thanks