Alpine protection and all-night comfort without the weight. Lightweight durability of Pertex® and breathable waterproof AscentShell™ makes for a faster and lighter solo shelter that you’ll bring everywhere.
The tapered shape of the Alpine AscentShell Bivy works best with tapered shape sleeping pads with narrower dimensions at the foot, ideally 22” or narrower.
Solo adventuring just got a whole lot more comfortable and convenient. Building on the reputation set by the cult-classic Alpine Bivy, this new version leverages AscentShell™ x Pertex® technology for a drastically improved breathability rating which leads to less condensation and a more comfortable sleep. Its step-in opening allows you step directly out of your boots and into your bed easier and without the fuss of shimmying. Extra large head space makes room for gear, and a no-see-um mesh comes in handy when the bugs are out for blood. This bivy is ideal for alpine pursuits, extreme weather, or anytime you want to skip the weight and space of a tent.
bluesign® approved AscentShell™ x Pertex® Shield Air Diamond Fuse 3L 100% Nylon Upper. 100% Nylon 40D with TPU lamination Floor. bluesign® approved 100% Polyester Mesh
18.6oz with pole, 16.8oz without pole/528g with pole, 479g without pole
Intuitive stretch. Reliability in wet weather.
Since 2016, Outdoor Research's proprietary AscentShell™ technology uses an electrospinning process to create a 3L construction that breathes faster, weighs less, stretches more, and far surpasses the comfort of traditional waterproof membranes. Never crunchy or noisy, AscentShell™ is just as comfortable as a soft shell, with the performance of a hard shell. Air permeable and breathable, AscentShell™ vents perspiration and excess heat during aerobic activity, while its light weight saves precious energy on demanding endeavors.