The topeak mtx drybag trunkbag is a quicktracktrade compatible trunkbag featuring drybag technology it39s made from 420 denier and 840 denier waterproof nylon with sonically welded seams it39s 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 topeakrsquos quicktracktrade system makes mounting