Wood/natural fiber polymer composites are materials made by combining wood particles or other fibrous materials with polymeric resin and additives to improve performance.
As a simple matter of durability and product lifespan, liners constructed with neoprene additives are typically more expensive than those that are not.
The term genetic enhancement is sometimes used when a double (deleterious) mutant has a more severe phenotype than the additive effects of the single mutants.