During testing, the Sea to Summit Comfort Deluxe did not inflate at all when left open for an hour—typical for self-inflating mattresses during the first use and after lengthy storage periods.
Like all self-inflating mattresses, it’s best to keep your expectations low the first time you try to inflate. During testing, the Sea to Summit Comfort Deluxe did not inflate at all when left open for an hour—typical for self-inflating mattresses during the first use and after lengthy storage periods. Subsequent attempts to allow the air mattress to self-inflate went much better, but still expect to do some significant top-off.