Double K - System One Diving Backpack kurs or as part of a

or as part of a matching C4 mask-and-snorkel setup

Best Divers Blinking light

the bright fluorescent yellow color makes it more visible

Sequential Frenzel and Mouthfill work

The Double K Freediving Buoy is a large

Double K - System One Diving Backpack kurs or as part of aDouble K System One Diving Backpack PRE ORDER NOW! (delivery ~ end. August) The Double K System One Diving Backpack is a large, stylish freediving gear backpack for divers who want to carry fins, wetsuits, masks, snorkels and accessories in one clean setup. This is not a small daypack and not a basic mesh bag. The System One is designed as a high capacity diving backpack with enough space for serious freediving equipment including up to two full sets