Rolling a dry bag properly could be the difference between a spare set of warm cozy socks or cold sludgy dead weight (and thatís just the socks Ė not to mention your feet) Roll-top dry bags are not meant to be waterproof in long-term submersion applications, but they can keep your gear dry and floating safely on top of the water when your canoe tips.
First, you will want to purge some of the excess air from the bag. If you donít, you might not be able to roll the bag down as far as you need. Next, pull the top buckle apart so the top is taut, and then roll down the stiffened cross bar down into the bag a minimum of three tight rolls Ė more if the bag is not full or to maximize the seal protection.
Now there are differing methods (depending on the product)to hold the rolls in place. 1) You can pull the buckled corners of the bag down toward the bottom of the bag and attach to the adjacent buckle mate coming up from the bag bottom, or 2) you can attach the buckles into each other.
When you do make that final buckle, it is best if the bag is billowed out firmly, as this will help to hold a tight roll, which improves the quality of the seal.
The images below show the roll-top method being used on two different final attachment methods.