The roll top closure gives wide easy access to the contents & the stiffener bar ensures a waterproof seal provided it’s rolled over at least three times. The PD620 fabric is waterproof to 1000, 000 mm water column & fold resistant to 100, 000 folds, all the seams are high frequency welded creating a waterproof construction. Due to the type of closure the Rack Pack is rated to IP4 (protected against splash water coming from all directions) so it is not submersible. This tough bag is perfect for travel in all environments & is particularly suited to motorcycle travel & cycle touring. The Rack Pack is fitted with adjustable straps for closing the bag, padded grab handles & a padded adjustable shoulder strap.