GIANTARM 10pcs Filament Storage Bags, 0.26mm 3D Printer Filament Storage Bags, Prevent and Monitor Moisture Keeping Filament Dry, 39.5x32.5cm (No Pump)

These are totally reusable and very well made. They even come with two plastic closure tools to help you get a perfect seal every time. These are MUCH heavier than standard zipper bags or standard vacuum bags for your food sealer. I bought a little rechargeable battery operated vacuum pump and 3D printed some desiccant holders that fit in the center of the spools. These work great and I live in the midwest where 60% to 90% humidity is normal.

Right off the bat, 3 of the bags came with holes and would not become airtight. 4 of the other bags have lost the ability to become air tight. I’d find another brand if I were to purchase again.

Until I got these bags I was vaccum sealing my opened rolls of filament, which uses up expensive rolls of vacuum sealer bags very quickly since they are big. This seemed like a good idea so I decided to try them. The price is very reasonable for a pack of 10, and they include a couple of plastic sliders which you can use to close the resealable top, like with freezer bags. I ended up throwing these away as I could never seal the bags with them, they were very easy to squeeze and seal with your fingers so not a problem. I then tried vacuuming them out with the little handheld inflator/deflator you see in the picture. Unsuccessful. You need stronger vacuum to do it. When I pulled out my food sealer, which has an attached hand vaccuming unit for jars I was able to vacuum it really well, as in the picture. You may also be able to use the normal vacuum sealers if you position the vacuum port on the bag just right, but I didnt try this. I has held vacuum now for several days and I really like this, you can pull out a roll of filament, use part of it and seal it up again when you are done. The bags seem tough so they should last for many rolls of filament and same money in the long term while keeping your filament moisture-free. Recommended!

These are large for a single roll of filament. There is no vacuum valve. Just a sticker that says "air valve". Better options out there.

These bags have a good quality feel to them, seal well, and hold a vacuum well. As shown in the video we used a mason jar vacuum to suck the air out of the bags and that continues to be the best choice for us.

Filament typically comes vacuum sealed in non-reusable bags with a desiccant dryer inside but once the bag has been opened it is exposed to the air and will, in time, absorb moisture. Moisture causes print problems such as bubbling and stringing. I was therefore delighted when I came across these vacuum seal bags and got them right away. When they arrived, I discovered they have an odd seal, not at all like the vacuum bags used for storing laundry. These bags don’t come with a pump, and the pump I owned was for a bigger, hard plastic valve. I ordered an inexpensive pump. Once the pump arrived, I was able to try them. They are about as thick as regular Ziploc bags. The seal is low profile and doesn’t look like it would hold, but it does. You get 10 bags and two plastic thingies that you can attach and slide to compress the seal. You can still do it by hand. The thingies just make it much easier. I have used half the bags already and have been happy with the result. No problems so far. They seal tight like the bags the filament originally shipped in.

These are on-par with what I've been using and ordering the past year and half. No issues with leakage or inability to seal at the zipper. I use an electric suction pump along with a manual one when I don't keep the charge up on the electric. Easy to siphon air out from the adhesive flapper and this is the slightly large bag that fits Amazon and other larger/ wide hard plastic spools easily. So far, so good and arrived just in time, as I was down to 2 remaining bags for filament. I will be ordering another 10 bags from Giantarm, since they're on sale at the moment. NOTE: This DOES NOT come with a pump at all, just 10 bags rolled up neatly in a bundle with two zipper depressing tools to help ensure a good seal.

These are a waste of money. Unlike other brands, they will not hold a vacuum under any circumstances. Buy a reputable brand and save yourself some grief.