Austlift Flat Web Sling AustLift flat webbing slings are manufactured to the specifications of Austlift and according to Australian Standard AS1353.1. Fabricated using 100% high tenacity polyester yarn. Durable and specially woven, 100% polyester with standard folded eyes that incorporates eye wear padding to provide maximum protection around the eyes. Each sling is proof tested, individually serial numbered, tagged and complete with test certificates.