Gel is a recent newcomer to the mattress space. It is being used as both a standalone layer and an infusion into foam. Gel benefits mattresses by retaining less heat than memory foam. Also, newer gels compete against memory foam by being more responsive and less toxic.
Gel is similar to foam because it is a polymer made by blending plastics and other chemicals.
Because of gel's heat diffusing properties, it is generally found in the top layer of the mattress under the cover.
Pros: Cooler sleeping surface vs memory foam. More responsive feel when not combined with foam.
Cons: Similar to foam, it is a synthetic blend of chemicals.
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.
Overall Score:
Gel: 8.6/10
Wool: 9/10
Comfort:
Gel: 8.7/10
Wool: 8.9/10
Softness:
Gel: 8/10
Wool: 9.3/10
Cooling:
Gel: 8.1/10
Wool: 9.2/10
Hypoallergenic:
Gel: 8.1/10
Wool: 9.3/10
Odor:
Gel: 8.9/10
Wool: 9.1/10
General Support:
Gel: 8.1/10
Wool: 9.2/10
Eco-Conscious:
Gel: 8/10
Wool: 9.3/10
Price Value:
Gel: 9.2/10
Wool: 9.2/10