A blast and fragment resistant polyester or polyether-based polyurethane boot sole includes embedded protective material throughout the entire sole. The embedded protective material consists of one or more layers of woven polyaramid fibers. The polyaramid fibers are thinly coated with polyester or polyether-based...http://www.google.fr/patents/US6505421?utm_source=gb-gplus-shareBrevet US6505421 - Blast and fragment resistent polyurethane boot sole for safety footwear
Blast and fragment resistent polyurethane boot sole for safety footwear
