Received these packs today and started using them straight away. Ignore the description that says they are sealed. You are not. And ignore Rob's "best review" saying he doesn't understand what Gary is talking about; his pockets appeared to be airtight. Of course, right after most of the air has been deflated, they're pretty tight and you can't separate the sides, but as others have pointed out, wait an hour and the bags will be back to normal. I used the included red straw to hold it as close to the vacuum as possible. I was happy with what I thought was a good seal. When I checked a few hours later, the bags were back in "reinflated" condition. However, I suppose it's better to leave the filament between the bags and the desiccant. I only give 3 stars because of the "false advertising". But the quality (thickness) of the bags seems good and my 1kg spools fit in with plenty of room.
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