You might think that with at least a few hundred thousand years of human civilization, with most of our existence living outdoors and all the technology invested in outdoor gear and survival that by now the sleeping bag would have reached the limits of innovation. Well if you did, think again. The Kammok Thylacine sleeping bag pushes technology and expectations even further. Combining an array of their own technologies (waterproofing, windproofing, breathability and heat reflective shell), the Thylacine with its patent-pending baffle locking system looks to deliver variable warmth and function so you only need one bag for all your frontier and outdoor adventures. Able to use both synthetic and down, the shell allows you to swap or layer baffles as needed for your comfort and more importantly in extreme conditions, your survival. In addition to the temperature-adjusting baffle customizing functionality, the Thylacine also lets you to change your bags length and width where it matters. Available to you as either the Kammok Thylacine Ultralight (UL) or the Expedition (X), the Kammok team braved no less than the Patagonia Mountains to help ensure the quality and functionality of this boundary pushing bag prior to demanding your hard-earned coin.