Sorbothane

Sorbothane is the brand name of a synthetic viscoelastic urethane polymer used as a shock absorber and vibration damper.

[2] His research into the energy dissipation properties of human soft tissue disclosed a structure very similar to an interpenetrating polymer network.

It is considered to be a good vibration damping material, an acoustic insulator, and highly durable.

In addition, Sorbothane has been used by NASA to isolate vibration,[5][6] in the Air Force Memorial,[7] and to transport the Liberty Bell.

[8] It is currently used with insoles and heel pads to absorb impacts during sports activities such as football, cricket, and rugby.