messenger bags/satchel briefcase bags are all built to last the test of time. All genuine vegetable tanned goat leather is 3-4 oz, processed to withstand almost any condition. Features include; variety of inside and outside pockets for convenience, adjustable shoulder strap, and a strong resistant Canvas. The leather is not processed by any chemicals or dyes. Natural vegetable oil is used on the bags to pick up texture when it is left out in the sun for sun tanning. The bag/leather will get soft and will pick up more texture with the age of the bag. Please note that the bag color may vary from the picture because of the natural tanning process.