These loop straps are made with 1" Heavyweight Polypro, and a ratchet buckle. These are meant for those applications where you just have to have it tighter than tight.[if gte mso 9]> <![endif]Choosing the Buckle Pad option will add a sewn section ofBlack Heavyweight Polypropylene under the buckle area to protect anythingbeneath it from scratching. Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;}<![endif] For more information on hardware measurements as well as how to use these straps, please click on the technical specs tab. Heavyweight polypro is great for the outdoors because it has excellent UV protection so the color will not fade, and it has a low water absorption rate.