I'm extremely happy with this wallet. I got a Fat Herbie in Color 4 Shell with a reverse interior. I was concerned that the FH would be too bulky for my pockets, but it fits perfectly in my jeans and dress pants, and doesn't slide around weirdly like bifolds do. My old bifold wallet was 22mm fully loaded, and this FH was 16mm carrying the same. I've never had such a comfortable back pocket wallet. The Color 4 shell is gorgeous. Great depth of color, and the big slab of leather on the FH really showcases it. I've had other (non-Horween) shell wallets, but this material is a whole different level of richness. The reverse interior was also a great suggestion by Phil. The inside doesn't 'stick' like shell tends to do when closed together. I'd suggest this to anyone else considering a shell wallet. I hoped this would be good when I got it, but this surpassed every expectation! I can't wait to see this age.