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.

They are only good for a few time use then they stop working

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.

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.

So here is a good deal if you think about it. 10 bags for this low price. The bags are light weight material. There is a seal that traps the vacuum inside just being like a sticker. It is needed to have an extremely high amount of vacuum to over come little ports of this sticker to remove the air inside the bags. A milwaukee vacuum cleaner did not work. A regular house vacuum cleaner did not work either. So here I sit with filament in a bag and can't remove the air. This kit does not come with a pump like most kits do. I did find a pump from a previous kit that apparently did work and took alot of effort to get it to work. Made the pump get really hot too. In the end when I removed the pump the bag self sealed. I just made sure the sticker was flat. The sticker is so thin I thought it would just rip when trying to remove the air. To my surprise as well it has been one of the best bags found yet. As long as the effort to remove the air is ok. Lots of work there. It seems to be the bag can be reused again. It is not as easy as it seems to be. I would buy these again only of there was nothing left to use or on filament that has the most up importance to it to keep moisture out.

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.