ANW Webstrops are made of 100% high tenacity polyester resistant to oil, sea water, UV radtion and most acids. ANW Webstrops have been reinforced, extra long eyes to suit most hooks. All ANW Slings/Straps come with individual serial numbers referenced to the test certificate. ANW Webstrops are colour coded in acccordance with DIN-EN 1492-1 norms.