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Our close to body fit with a low profile silhouette for ease of movement

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Our standard, slightly off body fit for unrestricted comfort

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Our roomy, off body fit for maximum comfort and easy layering

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Arc'teryx

<p>Designed for protection and performance in the harshest mountain environments, this is the flagship shell from the alpine obsessives at Arc'teryx. Built to exacting standards using extraordinarily durable N100p-X 3L GORE-TEX® Pro fabric, the Alpha SV is cut to fit over thermal layers while allowing dynamic climbing movements. A stiff-brimmed adjustable storm hood, urethane-coated external zippers and burly die-cut cuff adjusters make this thing an absolute fortress when conditions deteriorate, keeping you safe and comfortable while you work out your next move. Climbing-friendly features like underarm gussets and harness-friendly pockets make this the natural choice for alpinists, ice climbers, ski mountaineers and anyone looking for a totally reliable waterproof breathable shell.</p><ul><li>Completely waterproof, breathable and durable GORE-TEX Pro construction</li><li>Face fabric is extraordinarily hard-wearing for maximum abrasion resistance</li><li>Micro seam allowance of 1.6mm reduces bulk and weight, as does extra narrow 8mm seam tape</li><li>Regular fit is designed to accomodate multiple thermal layers</li><li>Articulated construction facilitates dynamic moves in mountain environments</li><li>Underarm gussets keep jacket from lifting when you're swinging ice tools or reaching overhead</li><li>Adjustable storm hood is helmet-compatible, with a laminated brim to deflect rain and snow</li><li>Tall collar with laminated chin guard</li><li>Highly water-resistant external zippers used throughout</li><li>Pit zips for easy venting</li><li>Pleated chest crossover pockets offer extra volume when needed, and sit well above a climbing harness for easy access</li><li>Left bicep pocket safely stores a ski pass or ID</li><li>Internal zip pocket</li><li>Internal dump pocket</li><li>Laminated, die-cut Velcro® cuff adjusters reduce bulk, and won't catch or tear off</li><li>Drop hem provides extensive coverage, with cordlock adjusters that also prevent hem from slipping up above climbing harness</li></ul>

Arc'teryx Alpha SV Gore-Tex Jacket - Men's

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The standard test for waterproof fabrics uses a standing column filled with water.  The figures given are the water column height.  A rating of 3,500mm or higher can be considered waterproof.  The higher the rating, the more durable the waterproof fabric will be over time.

Waterproof garments use waterproof-breathable technologies and are fully seam-taped. Water-resistant garments use waterproof-breathable technologies but their seams are not taped. Water-resistant garments repel water and protect against wind but are not made of waterproof fabric.

A windproof garment does not allow any air to permeate the fabric.  A garment with windproof panels has panels of fabric that are totally windproof, but the rest of the garment may not be windproof.  A wind-resistant garment resists some wind, but not as much as a garment that is windproof.

The rate at which a waterproof breathable fabric expels moisture when the inner surface is moist from perspiration.  Values under 8,000g/m2/24h provide low performance, 20,000g/m2/24h provide moderate performance and values over 30,000g/m2/24h provide high performance.

Usually referred to as DWR. A treatment made to fabrics that causes water to bead and run off instead of soaking through. 

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Arc'teryx Alpha SV Gore-Tex Jacket - Men's

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