G'day Lee,

Thanks for the question about the Sea to Summit Air Stream Dry Sack. You should be able to use this with any Exped mat with a 20mm valve, or if you have an older mat with the 30mm valve then you should be able to use with the adaptor.

G'day Peter, this is going to be a long answer sorry, we did a little research and testing. The Exped Schozzel and the Sea To Summit Air Stream Dry Sack are pretty much the same thing. The main exception being that Exped has two different Shnozzel Pumpbags to fit different valve sizes. 30mm is the old valve size and 20mm the new, these measurements are the internal diameter. The Sea To Summit Air Stream Dry Sack is compatible with the 20mm valves, which means it works on all the Exped self-inflating mats such as the SIM and Megamat ranges. It will attach to the pump on the Downmat and Synmat, but it is not overly effective as you have to force air through the built-in pump, the extra pressure required causes the pumpsack to keep popping off. The Exped Schnozzel is hard to come by in Australia, but the Sea To Summit Air Stream is a perfect alternative.

The Air Stream Pump Sacks are pretty large sacks Kate, you'll easily fit any of the Sea To Summit hiking mats into this, along with a bit of other gear.

They are made of lighter weight material than the regular stuff sacks, so I'd keep the contents of it to soft items such as your mat and some clothing.

G'day Jan,

For the sake of durability and easier packing, I would recommend getting a compression sack and using the Sea to Summit Air Stream Dry Sack for something else. The Air Stream Dry Sack is quite thin and compact and could just be rolled up with the sleeping bag if need be.

G'day Ian,

Just the one size in the Sea to Summit Air Stream Dry sack. Your Sea to Summit Ultralight Insulated mat will fit no worries.

G'day Darrell,

Unfortunately the Sea to Summit Air Stream Dry Sack is currently only compatible with the range of Sea to Summit mats and there is no adaptor available. 

G'day Darrell,

We are not aware of any adapters for this pump sorry Darrell.

G'day Tim, 

The Sea to Summit Air Stream Dry Sack is not made to be compatible with Exped Mats, so it's not going to fit with the Synmat unfortunately. 

Hi everyone, just to clarify we've tested this out again and it looks like the Air Stream Dry Sack will fit with the Exped mats that have the 20mm size valves. Apologies for the confusion! 

Hi Graham, 

Unfortunately the valves are different sizes so this pump won't work with your Thermarest mat, sorry! 

G'day Michael, 

The Sea to Summit Air Stream Dry Sack has a 20-litre capacity, and to fill it with air you just blow into it once and the sack will be inflated.

To get an idea of how many compressions are necessary to inflate a mat, a Sea to Summit mat will take two to three compressions with the Air Stream Dry Sack.