Dry-bag back-packs make good sense, when the boat is to be contained therein for transport, and when equipment is to be stowed waterproof when afloat.

For GRABNER boats:
HOLIDAY 3, ESCAPE 1 (from 2020), MEGA, RIVERSTAR
XR TREKKING, OUTSIDE, ADVENTURE, ADVENTURE EXPEDITION, ADVENTURE SL, 
SPEED, MUSTANG S, MUSTANG
 
DETAILS:
Extreme tough heavy duty and 100% waterproof truck canvas
Overlapping roll-up seals
Double lifting bottom
2 adjustable padded shoulder straps
Body belt
2 carrying handles
2 adjustable tensioning straps

Colour: red/black
Usable volume: 180 litre
Size: 95 x 50 x 38 cm
Weight: 2.1 kg

ATTENTION: Items (like mobile-phone, camera and documents etc.) that must not get wet under any circumstances, should additionally be packed in a plastic bag.