FAQ: Should I protect my canvas and leather from the sun?
The sun's rays contain damaging ultraviolet (UV) light that can be hard on fabrics and leathers but don't worry, there's no need to become a vampire (although have you noticed how good they look in leather? Just sayin'...). Canvas will typically fade with exposure to UV light while leather will typically darken (just like our own skin). To a certain extent, that's just part of the delightful patina of well-aged adventure gear and the key is simply not to let it get excessive to the point where the actual fibers begin to degrade. So don't store your bags in direct sunlight and, if you're planning a trek through the desert, you'll probably want to leave a little room in your pack for some extra conditioner.