The epitome of ultra-lite simplicity, the Ion was designed for ultra-lite fast-packing, summit bids, and adventure travel. Constructed of super durable Dyneema gridstop fabric and a single watertight zipper at the opening, this top-loader features spacermesh shoulder straps for comfort, an adjustable sternum strap and webbing hip belt, a hydration tube opening and a haul loop. Extremely compact and minimalist, the Ion is a feather weight 9 ounces!