As seen on fjallraven.com.au When talking about backpacking, the bare essentials are usually called “The Big Three.” The Big Three are your choice of backpack, sleep system, and shelter. These items comprise the most important kit you can take with you on a trip. The backpack should be large enough to accommodate all of your gear inside. The sleep system is the combination of sleeping mat and sleeping bag (or quilt) that you will use; which depends on the environment you will be in. While the shelter will be key to keeping dry and storing your gear. But, what are…