Tempur material is memory foam manufactured by Tempur-pedic. Tempur-pedic owns the original formula of memory foam developed by a NASA contract.
Tempur-pedic offers a variety of mattresses from firm to plush that use varying degrees of Tempur material along with higher density foams.
The main difference between Tempur and other types of memory foams that have been developed by competing foam manufacturers and mattress makers is the blend of substances in the memory foam.
Pros: Tempur material is the 'original' memory foam and has been refined by Tempur-pedic's scientists over the years specifically for mattresses whereas other types of memory foam may not have been as well developed.
Cons: Like other memory foams, Tempur material is a polyurethane foam blend and prone to claims of off-gassing.
Wool is made of sheep fur. It is sheared from the sheep multiple times in their lives.
The most famous kind of wool being used in mattresses is New Zealand wool because of its attention to quality.
Wool is commonly found in the cover or as a comfort layer. As a comfort layer, it is packed tightly in the mattress so it can add softness to the top layers of the mattress. Some untreated wool may have a slight natural barnyard smell. It is also a natural fire retardent.
Pros: Wool is an all natural alternative to other types of comfort layers.
Cons: The quality of wool bedding is entirely dependent on mattress craftmanship. If the packing is too loose, there can be quick sagging and durability issues.