Chromexcel is the classic “pull-up” leather meaning that, when folded and flexed, greases that were impregnated into the skin migrate causing a very nice tonal effect. It also has a very bright luster or can be left unpolished to have more of a matte finish look. Chromexcel is a very versatile leather and is often found in boat shoes, classic shoe styles from Alden and Allen Edmonds, and many belts and small leather goods. Chromexcel has a “refined ruggedness” and will quickly develop character and having similar aesthetics to your grandfather’s old wallet very quickly.
Chromexcel is only made by Horween Leather Co. in Chicago where it has been being made consistently since the early 1900’s. The process in creating a piece of Chromexcel takes 89 separate processes (many of which are completely by hand) and takes 28 working days to complete. Unlike many leathers, Chromexcel is air dried which allows the leather to shrink back on itself. Many tanneries will cringe at this concept because it decreases the yield (tanneries sell leather by the square foot) but also gives the leather a tighter, more calf-like, break as opposed to other drying methods like pasting or vacuum drying. Chromexcel and shell cordovan will scratch and scuff rather easily and, due to the high grease content, these scratches can be buffed out rather easily. However, shell cordovan is the only leather where you can completely remove a scratch. You can find the best source of information on the Chromexcel process here, written by Nick Horween.
Shell cordovan was originally produced to hone straight razors as it was used for razor strops in the early 1900's. It has been made on a daily basis in Chicago by Horween since 1905. Shell cordovan is like a great wine that only gets better with age, except you can drink it every single day.
It's definitely the best leather to use in any small leather good, especially for a wallet. The action your pocket has on the wallet with daily use leads to a polishing effect which allows the vegetable tanned shell cordovan to develop an amazing patina over time. As mentioned above, shell cordovan has a very beautiful mirror-like luster which can be brought back forever using different polishing methods. At Ashland Leather Co. we use a modified version of the Mac Method to polish our wallets, along with Saphir Cordovan Creme — This involves moisture, a lot of brushing, and a very small amount of polish.
Cordovan has a very unique feature of not creasing — if you look at many pairs of leather shoes where the toe flexes just above the toe box and below the laces you will see a pebbled effect. What is happening is that, after flexing and long periods of use, the grain layer of the leather is separating from the fiber layer of the skin which creates a sometimes undesirable/inconsistent pebbled look. Shell cordovan will never pebble because we are not using a grain layer at all — the unique fiber structure of the shell cordovan is found under the skin of any equine animal’s hind quarter (yes, shell cordovan is horse butt). These shells are oval shapes and there are approximately two square foot ovals in each horse (as opposed to a 50 square foot bovine hide). Handling and processing these significantly smaller pieces leads to a higher cost, as does the extensive 6-month (mostly by hand) tanning process.
The Fat Herbie Double Bifoldbelow in natural shell cordovan will give the most dramatic patina of any leather.