Possibly the perfect pack for outdoor enthusiasts, CamelBak's Alpine Explorer is great for all-day adventures. Its large carrying capacity and 100-ounce reservoir make it versatile enough to take on daylong hikes, riding, climbing and even jaunts through the city. The pack's two compression straps offer incredible stability and its ventilated back panel makes it comfortable for hours on end. And, there are even sleeves for carrying an ice axe or trekking poles if your ascents are as serious as this pack