Inselberg Built for the Storm

Inselberg is a New Zealand alpine apparel brand founded in 2021 to build technical gear for climbers, guides and alpine professionals. It co-develops its products with working pros, including Climbing the Seven Summits, New Zealand search-and-rescue professionals and year-round alpine guides. The Axiom Hardshell was developed with Aoraki Mount Cook Alpine Rescue. The name is German for "island mountain": an isolated peak left standing after softer rock erodes away.

Inselberg pairs a 140-denier face fabric with a 4-layer Toray Dermizax system: a microporous, water-repellent membrane plus a hydrophilic (moisture-moving) inner layer. Inselberg says this gives stable, long-term waterproofing and internal moisture control without relying on open-pore technology, and that it keeps performing even when the shell is saturated or heavily used.

The Axiom is built first for storm protection: "prolonged exposure in severe alpine conditions." For uphill or high-output efforts it has pit zips for mechanical venting, and the hydrophilic inner layer moves moisture out. Honest answer: UKHillwalking's reviewer found it "isn't the most breathable of winter shells" (it's rated 10,000 g/m²) and that breathability comes second to durability. If most of your days are long, warm tours, come talk to us about a lighter shell; on storm days and in cold, wet snow the Axiom is the one you want.

Yes. UKHillwalking's reviewer describes the hood as exceptionally large: it fully encases you over a helmet, with chin coverage right up to your eyes. The trade-off is that it's a little roomy when worn without a helmet. Inselberg's Dual-Access chest pocket can be reached under pack straps, and the jacket weighs 596 g in size M (UKHillwalking).

Inselberg cuts the Axiom for alpine layering while preserving range of motion. Fit is personal, so the best answer is to try it on at our shop with the layers you actually ski in, or tell us your height, chest and usual size below and we'll recommend one.

Inselberg backs its gear with what it calls the Inselberg 5-Year Guarantee, covering defects in materials and workmanship (fabric tears, zippers, hardware, delamination, stitching and seam failures). Normal wear, misuse, third-party alterations and loss aren't covered. Claims start with Inselberg's warranty form and proof of purchase, so keep your Ridgeline receipt; we're happy to help you file.

Inselberg designs every product to be repairable and runs a Repairs Programme for tears, punctures, abrasions, zippers, drawcords, hardware, delamination and seams. Warranty repairs are free, and Inselberg provides a loaner jacket of similar design while yours is being fixed. Assessments take 3–5 business days and repairs 4–6 weeks, according to Inselberg.

Both. Inselberg body-maps synthetic insulation into the areas most prone to moisture and uses 850 fill power ExpeDRY down in the core, treated with gold particles that Inselberg says help the down dry faster and keep its loft. It has a 15-denier outer fabric and a 10-denier liner, and was developed with Everest guides as a technical midlayer for cold, harsh days.

They're Inselberg's new-season pieces arriving at Ridgeline now: the Binary Shell (men's and women's) and Binary Bib, the Euler Quarter-Zip and the Affine Vest. Inselberg hasn't published full specs for them on its own site yet, so we won't guess. Ask us below and we'll send you the details as soon as we have them, or reserve your size now.

This season's Inselberg order is on its way to the shop. Sizes marked “On the way” can be ordered now and ship or are ready for pickup as soon as they arrive. Reserve below and we'll hold your size and let you know the day it lands.

At Ridgeline Bike & Ski, 10100 W. Overland Road in Boise, serving Boise, Meridian, Eagle, Kuna, Nampa, Caldwell and the Treasure Valley. Call (208) 376-9240.