I always bring my snorkel gear in the mesh bag it came with--it fits me perfectly as it was sized at a pro dive shop. No leaky mask and hours of entertainment. I stuff a few other items in the bag since it is my main carry on-- shorts, swimsuit, change of tshirt, cosmetics etc in case my luggage is delayed. I must say that there have been a few trips out of 15 or so that I didn't use it at all--sand gravity--other spontaneous plans etc but still I didn't regret hauling it along for the trip.