CamelBak Arete Sling 8 Pack Perfect for Hiking, Exploring, and More Arete Sling 8 This hike pack is made with light and durable recycled materials, constructed to withstand any trial on the trail. The Arete Sling 8 brings a breathable air mesh back panel and strap, supplying long-lasting cool and comfort for your next expedition. Enjoy alternating action with the easy left and right shoulder carry option and 1.5L Reservoir compatibility. Stash pocket on the shoulder strap. Durable, double-layer stretch overflow pocket provides ample room for your adventure essentials. Repurpose Gold Sustainability Badge: Made with recycled materials and designed to preserve resources and diminish disposables.