The Waterproof Performance of GJS-303 Nap Box
In the ODN market it's rare to find a nap box that have promised water and dust resistance, let alone IP68.
But if you're spending good money on a nap box used in the outside, you need to know it's going to survive the rain or dust anywhere.
IEC (which defines the international standards for IP ratings) doesn't specify what the depth or the duration of water protection is..
Typically, you'll find that 7 would be 1 metre for 30 minutes and 8 would be more than that.
This time, Tuolima tested the GJS-303 nap box in the depth of 1.2 metre for 24 hours.