You’ll find ten real, current models (all 40 litres or less… this is not really a gear bag after all) chosen for sheer versatility. Sublue Waterproof Backpack 30LInside, there are internal pockets to keep valuables separate, and an external sleeve takes wet gear without it soaking your inside goodies. Apeks Dry Rucksack 30L – £114 / $129From a brand synonymous with tough diving kit, this Apeks roll-top dry bag seals out salt, sand, and splash with precision-stitched PVC-lined fabric. Sea to Summit Ultra-Sil DryBag 20LIt’s not designed for carrying lot’s of your tech gear, but that’s not its purpose. Pros:Ultra-lightweightIncredibly packableSolid dry protection for essentialsCons:Not paddedMinimal organisational featuresUnsuitable for heavy gearCressi Octopus Dry Backpack – £59.99 / $81.95Cressi’s Octopus Dry Backpack hits that sweet 30-litre spot: big enough for essentials, small enough to stay nimble.