This article needs attention from an expert in Chemistry. Please add a reason or a talk parameter to this template to explain the issue with the article. WikiProject Chemistry (or its Portal) may be able to help recruit an expert.(March 2009)
LRPu or low-resilience polyurethane is a material distinguished by an "ability to slowly return to its original shape" (viscosity).
The resulting impact resistance results in LRPu being used in soft laptop sleeves and other lightweight cases for portable electronic equipment, as an alternative to the softer neoprene.
May be related to, or be the same thing as Memory foam.