TheTopeak MTX Drybag Trunkbagis aQuickTrack™ compatible TrunkBag featuring DryBag technology. It's made from 420 denier and 840 denier waterproof Nylon with sonically welded seams; it's a drybag roll top closure and weather-tight zippers keep that contents dry, while rigid EVA foam provides protection from road shock and vibration. Its divided main compartment helps keep things organized. Slide, click and go! Topeak’s QuickTrack™ system makes mounting any QuickTrack™ equipped bag or basket to a Topeak rear rack incredibly easy. Simply line up the composite QuickTrack™ base with the channels on any Topeak rear rack and slide forward until it clicks into place ... More info