Everyone seems to have their own definition of what constitutes "waterproof." For that reason, this rating system was created to present you with a simple way to compare the level of water-tightness across products and manufacturers. After all, a rain-coat can be waterproof, right? But will it keep you dry if you jump in a lake? Originally developed by ROC Gear, Inc. for use at The Waterproof Store, but quickly becoming the accepted standard for all types of waterproof containers (cases, bags, backpacks, etc.) These ratings in no way constitute a guarantee from ROC Gear, but rather offers the consumer a way to quickly and easily understand the level of water-tightness among various products from various manufacturers, and present them all together on one common sliding scale... class 1 being the least waterproof, and class 5 being the greatest. The official Waterproof Case Rating System classes are defined as follows:

Class 1 - Water resistant for light rain or light splash applications.

The product could be permeated by water in any of the following situations: prolonged water exposure, heavy top-down watering, forceful water pressure applications, or submersion

Class 2 - Waterproof in top-down watering applications

The product could be permeated by water in any of the following applications: forceful water pressure, water injected from odd angles, or submersion.