These high density, flexible cellular products are manufactured by continuously casting and curing mechanically frothed urethane intermediates to the desired thickness.
Many foams are used for cushions or bumpers, however, most have poor energy absorbing capability.
Many bottom out on impact due to low density. Others allow considerable bounce on impact, in which case energy is not dissipated. It is also consistent from lot to lot and superior to most other cellular products. It is an open-cell material. When compressed these openings are closed off creating an excellent seal.