Smartwatches with IP68 protection

IP68 (long immersion)

— body with dust protection level 6 and water protection level 8.

Dustproof level 6 means that the device is completely impermeable to dust and other similar contaminants. And waterproof level 8 means that the device can be submerged under water to a depth of more than 1 m, stay there for more than 30 minutes and, usually, allows use directly under water (for example, pressing buttons). Specific restrictions on depth, dive time and "underwater" functionality may be different, they need to be specified separately. However, if you plan to dive to the depths or scuba dive, it is worth choosing a gadget suitable for this activity among models with water protection 8. However it is worth considering that not every such device normally tolerates strong jets of water; so the possibility of using it when surfing, jumping into the water, riding a jet ski, etc. also will be usefull to find out separately.