If you’re inflating it multiple days in a row I’d recommend this. Probably not necessary if you’re using it at a stationary base camp or only rarely.
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I am able to store my MegaMat deployed. I roll it up prior to the trip and then am able to set it out and self-inflate. Then about 4-6 breaths and good. Otherwise the larger scnozzle is was better than the supplied thing a ma jig