Someone pointed that a sausage without a overpreasure relief valve inflated at depth won't rupture 'cause the air will escape through the fabric. I'm not willing to test this theory with my $45.00 oceanic or the less expensive $29.00 SeeMe sausages. These sausages maintain air without leaking for long periods of time, I store them inflated and they won't leak the air. I think these sausages, are lined with some urethane or sealant in the inside to hold the air inside.
On the other hand, the zeagle seems to be a good option for those who shoot the sausage from depth due to the relief valve incorporated in its design. Currently I don't shoot the maker from depth, but in the eventuality I start doing this procedure, I'll consider the Zeagle or Dive Rite with the relief valve incorporated in the sausage.