When you remove invasives, you use your hands and arms a lot. So it's important that you protect them. Gloves are essential. In my experience, it's worth investing in high-quality gloves that give you more protection and last longer.
If you do lots of work with thorny species, like multiflora rose and buckthorn, you might consider getting gloves that cover up your forearms.
Alternatively, you can also consider getting a pair of arm chaps.