http://www.polyformes.co.uk/azote.html
It states this:
Evazote foams are tougher and more resilient than PLASTAZOTE foams and are mainly used in a wide range of sports & leisure and footwear applications. Evazote foam is moulded into knee pads that are durable, and resilient under repeated impact.
I know I love my ThinLight...except hold on to it, if you find yourself in a windy situation...it flys like a kite
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