il padrone wrote:All Exped mats now use a built-in hand pump with a valve for air in and a valve for air out= two valves. .
Sorry but need to correct you there. Not all Exped mats come with a built-in hand pump. The Synmat ULs for starters do not have pumps. Neither do the Downmat UL mats but they are supplied with a Schnozzel Pumpbag. I didn't bother to check the other models but I suspect that your statement does not apply to all models.