The ID key-ring is IP58 rated. It has been tested in 1m of water for 26 hours. Allowed to dry it was still working perfectly.
All devices except the ID key ring are Water & Dust resistant, IP57 rated. They are designed to withstand any fresh water splashes, dust, sun etc. They are not designed to go swimming in so if possible take it off before hand. Salt water is also corrosive, so if it comes into contact with salt water wipe down with a clean (fresh water) damp cloth as soon as possible.