Filament is wound around a cardboard core and secured with straps. This allows the reuse of the spool sides, reducing waste.
Nice idea
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Not liking them switching to plastic bags.
With cardboard boxes, you can stack them on the shelf. With these bags, it gets messy and you can’t see what filament is in which bag.
Definitely better than the usual full plastic spool, but IMHO a step back from “true” masterspool refills. I’ve already printed my MS spools, switching in a new refill is easy enough, and I never bother to store an already opened refill without a spool since I store all of my filament in a drybox anyway.
