I-PET strap (i-polyester strap) imigangatho yokulawula umgangatho iqinisekisa ukusebenza okuhambelanayo kunye nokhuseleko lomthwalo. Ngokwenkcazo ye-ASTM D3950, uvavanyo lomgangatho kufuneka luqinisekise amandla okuqina, ubude, ukuchaneka komda, kunye namandla okutywinwa kobushushu. Esi sikhokelo sichaza imigangatho ephambili yokulawula umgangatho, iiprothokholi zokuvavanya, kunye nokuba abathengi bafanele bajonge ntoni xa beqinisekisa umgangatho we-PET strap.