Made of a “hyperelastic polymer in a grid pattern” that’s similar to the gel cushioning inside an ergonomic backpack strap, Purple’s seat cushion cups the butt and tailbone even as you ...

This description fits most of the mattresses on this list, aside from Purple, which is made of a unique gel-like material.

Shoppers are raving over a 'cooling gel pillow' from Amazon which some say is helping them sleep during hot nights. The pad, which costs less than £4, can be slipped inside a pillowcase alongside ...