Favourite vegan luggage?

There are so many different bags and brands available that you should specify more constraints if you want more personalized recommendations. Vegan is not too hard to satisfy - most luggage that's vegan won't necessarily mention it, you just have to look in the description for animal products to avoid (leather / suede mostly).

For me personally, my main carry is a Tom Bihn Techonaut 30 - it's big enough to carry 5+ days of clothing and my laptop and other gear without needing another bag, but lightweight enough that when I need more space, I am happy to carry it as just a small backpack alongside my Travelpro Maxlite 5.

I also like the /r/onebag subreddit.