Basic knowledge: waterproof level

About which brand of waterproof duffel bag is good? We first need to clarify the definition of good. As a rule: waterproof reliable + durable and practical + beautiful handsome is good!
The definition of waterproof, splash-proof or immersion-proof or soak-resistant, this first to be clearly distinguished.
Splash-proof, generally ipx1-4 level, for example, the waterproof level of the home bath water heater is ipx4 level.
Anti-submergence, generally ipx5-6 level, that is, if the water, a certain period of time will not be soaked to the bag, ipx6 level can even be a short period of time to fall into the water surface or put on the surface of the water, and a certain period of time will not be wet and the internal.
Anti-splash, that is to say, with the performance of not taking in water when floating and sinking, and not taking in water when snorkeling and deep diving.
If it is a duffel bag that is waterproof, the brand is definitely the traditional outdoor big brand (the brand in Europe and America) these are good! These have already done the best, put aside the price to talk about quality, must be they are better.
If it's a waterproof duffel bag that's immersion-proof and soak-proof, the waterproof backpacks from smmis/fishpond/Podragon are excellent. In fact, the two classifications are no more than ipx6-8 level waterproofing differences.

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