Spools are well-labeled and manufactured from strong chipboard that has a steel Main that helps reduce friction while continue to getting fully recyclable. Fun fact: the Jessie line is named right after CEO David Randolph’s Pet. There is almost nothing "eco-friendly" about 3D printing, and there hardly ever might be. https://abs25814.losblogos.com/32295751/the-basic-principles-of-esun-abs-filament