Hello all. I decided to purchase the above sleeping mat and it’s a ‘self inflating’ one. It’s second hand but was told it’s inflating properly, but of course it’s not.

Don’t really want to put my mouth over the valve, so want to get a pump sack but they mainly seem to be aimed at their own brands and specific valves.

Does anyone have a recommendation for a pump sack that would be suitable for the above valve? Or have any other suggestions.

Thanks