The Camelbak Fairfax hydration pack is ultra lightweight and mainly designed to be used by cyclists. I will be using it mostly for hikes shorter than 2 hours. The pack comes in a choice of 4 dual colors, and the pack I have is Dark Cheddar/Graphite. The hydration bladder has a capacity of about 1.5 L (50 oz), and has a dual port so the hydration tube can exit either on the right or left side. The shoulder straps have loops to dress the hydration tube, and a breast strap which can be adjusted horizontally as well as vertically.