I got a new wing from ZEN xDeep. I orally inflated it but it is slowly losing air. I would say a small portion every day. Not a lot by any means but enough that I am concerned. The wing is brand new so I thought maybe the corrugated hose or inflator might have a slow leak so I replaced it with my DGX wing that holds air for a month or so and no change it still very slowly loses air. I did send tec gear (Sebastian) an email but it is holiday time so I was just curious. It looks like my original Zen wing holds air just fine