Drybags come in a range of waterproof ratings that make them more appropriate for some activities than others. In general the thicker the material the more waterproof and robust the bag, but it will also be much heavier and less malleable to fit into nooks and crannies in boats and kayaks, and packed into larger bags.
Look out for these badges with every product:
The method of sealing the bags is crucial. Some dry bags have two methods of securing them: you fold them over at least 3 or 4 times, click the buckles and then secure with a Velcro strip.
The bags are all rated for waterproofness with a two-digit IP number: Ingress Protection.
The first digit will be a number between 0-6, and indicates the degree of protection from ingress of solid objects (the user themselves, and other potentially harmful particulates such as dust or dirt).
The second digit in an IP rating will be a number between 0-9, denoting the quality of resistance to moisture ingress at varying intensities, angles, depths and pressures of exposure or immersion.
All our waterproof bags have a first digit of 6, meaning: Full protection against dust and other particulates, including a vacuum seal, tested against continuous airflow. The second digits are a 4, 5, 6, 7, or 8.