Amazon.com | Time Resistance Leather Backpack for Men and 。Time Resistance - Womens Leather Backpack - Jane Eyre Materials ·  Exterior made from genuine full grain calfskin that will last you for decades ·  Interior lined with leather ·  We make sure to offer quality materials that are long lasting and require little maintenance. It will be a good long while before you need to look for a replacement. (Although we can’t promise you won’t want to buy it a friend!) Tan ·  Hand dyed using the vegetable tanning method that utilizes only natural materials