Black Diamond designed its Speed 30 Backpack for day trips out on the mountain whether you're hiking, biking, alpine or ice climbing. Its removable reActive waist belt moves with your hips so you can bike and hike without any restrictions, and the SwingArm shoulder straps also allow a freedom of movement that you appreciate when you reach through vertical ascents. Black Diamond added its OpenAir mesh to the waist belt, shoulder straps, and the back panel for ultimate breathability that eliminates uncomfortable friction and hot spots. And the V Lite frame keeps the pack sturdy without adding much weight to it. The Speed's 210D nailhead material is very durable and light, and Black Diamond welded 420D abrasion overlays in critical areas so it doesn't tear up against the mountain's rocky ridges. One front and two stretch side sleeves provide room for a wind or rain jacket and water bottles. You also get two loops that accommodate either your trekking poles or ice axes, and a clip for a bike light can keep you visible if your day trip lasts past the sunset.