Vegan Leather, or whatever name you want to give this material, but regardless, a decent quality pen sleeve. Large enough to hold a Montblanc 149, designed well enough that a slender pen doesn’t just fall out.
While these are certainly not as luxurious as a Rickshaw sleeve, you can also pick up a half dozen of these for the price of one Rickshaw. Great for pens that deserve a sleeve, but not precious enough for a pricey one.