It's a Two Age Puff.

I'm using it right now, but I think it's time to replace it. I only ever use 2Age. It seems to have better adhesion than other puffs, too. It's really good to stock up on various kinds when they're on sale online or at Olive Young. I've tried other products, but 2Age suits me well. I might switch if a better puff comes out, though~ For now, I'm sticking with this one!