beardedcanadian wrote a review of Stoic WPF Compression Sack on September 5, 2011
Thought it would be a good addition so I bought all three sizes...not what I was expecting.
First, the valve always gets blocked with whatever is inside making it difficult to get the air out without pulling on the valve while trying to compress the sack...a mess screen or something would probably help this problem.
Second, once I/you/Houdini does get the air completely out, it slowly creeps back in. I have three sets of these and every one leaks air back in. I am a guide and have used all sorts of dry bags and compression sacks and never had an issue, these just don't keep air out, and with that if there is water, it will be able to get in. All, I mean everyone of the nine that I have has leaks around the top where the fabric meets the clear plastic...the fabric comes off the plastic. I have tried to glue them and they "seam" sealed (get it seam) but they still leak....
Verdict, not a bad "splashproof" bag, but not submersion proof. Also, not a compression bag, since they decompress in a relatively short period.
Would I buy them again? Not unless they fix the problems..I would return them, but I don't have the receipts.