Review on 💧 Advanced Moisture-Resistant Printer Filament: Humidity Control and Compression by James Roper

Moisture is bad for many types of 3D printer filament, so these vacuum bags are designed to protect filament spools from that humidity. The size of these pouches is perfect for a 1kg spool, so be careful when inserting the spool to avoid damaging the pouch. I also add a few 5g desiccant packs just to be sure. These are good quality reusable filament storage bags. I've sealed several coils in these bags for months and both held the vacuum. A manual air pump takes some practice to properly place the pump on the air removal bag, but once you get the hang of it things get a little easier. The main issue I had was that if I squeezed the bag too hard, the suction of the pump would pull on the opposite side of the bag and block the vent, preventing air from escaping the bag. Using less pressure helped avoid this problem. Overall, I am very satisfied with these vacuum bags and can recommend them.