The Access Original Soft Roll-Up Tonneau Covers is tested against all the possible constraints. What you need is what you get in this tonneau roll up, and you’ll love it just for that. The tonneau itself is UV resistant and made of double reinforced commercial grade vinyl fabric tarp that gives the smooth feel and reliable protection a high-end product should possess. Rolling up the tarp means there are no pre-determined stages when it comes to revealing the truck bed. No hinges or cracks to get in the way, and none to accumulate debris within. The clamps inside the bed rails are composed of sturdy aircraft grade aluminum metal. Made with specially cut teeth that help maintain grip in your truck bed giving these clamps exceptional strength and unsurpassed quality!