This small mod will simply enable transparency on all the sheaths in the game (not just the few ones that already have it) and put a transparent texture on all of them to make all the sheaths invisible (on swords, long swords, axes, spears...).

If you're already using other mods like Invisible Quivers or invisible Slate, this is your next one: getting rid of all the sheaths from your back!

                        Ko-Fi: https://ko-fi.com/i2mods 
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PS: Linkle mod is not required, just used her to picture the thumbnails.