Carbon fiber for me. I am a bit tired of having hefty wallets and it gives me the impression it might add some style to it. Call it a fashion statement if you will.
kiddPlus, if you drive a Civic, you can mount it anywhere on the hood and you'll be doing the 1/4 mile in 10 seconds or less. :-D
I'm with you. Tired of hefty wallets and really surprised that I haven't looked into this before now. Sometimes simple is better. This is far from the only slim/minimalist wallet available, but it ticks all the right boxes for me: card capacity, stylish looks, and a price point that isn't absurd.