I saw a vid of a wing sup downwinder in marginal winds. The wind dropped so he deflated his wing, put it in a back pack and pumped and paddled onto small swells. Later the wind picked up and he inflated his wing but the vid didn't show that bit. I can't imagine pumping it up out there.
I'd imagine you could use one of those little canisters that make soda-bottles ... the one that bicycle riders use on the road.
This guy did it ... wingsurfworld.com/news/james-caseys-world-first-deflate-downwind-and-re-inflate-all-whilst-up-on-foil/
The bike ones look like this. I'd imagine you can get an adapter..... 
k.
In the video he has a hose attached to what looks like a larger air canister that is strapped to the handle.
The 16gm CO2 Bulb used for bike tyres will have no where near enough in it to inflate a wing.
Select to expand quoteBrowy said..
In the video he has a hose attached to what looks like a larger air canister that is strapped to the handle.
The 16gm CO2 Bulb used for bike tyres will have no where near enough in it to inflate a wing.
Dead right.... maybe try a SodaStream canister??
Flight junkie is using the K-Pump mini and then crazy glued the adapter onto it.
