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Alpha SL Pant


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Alpha SL Pant Women's Lightweight, packable, waterproof/breathable women’s GORE-TEX® alpine pant designed for emergency weather protection. Alpha Series: Climbing and alpine focused systems | SL: Super light.

Lightweight, packable, waterproof/breathable women’s GORE-TEX® alpine pant designed for emergency weather protection. Alpha Series: Climbing and alpine focused systems | SL: Super light.

10 Detail Photo(s), 1 Video(s)


Crafted to deliver optimized performance for minimal weight, the Alpha SL Pant easily fits in a pack, ready to provide waterproof/breathable protection if needed. N40r GORE-TEX® fabric with Paclite® product technology is waterproof, breathable and exceptionally light. Its nylon ripstop face offers some abrasion and tear resistance. Where higher levels of durability are required, Arc’teryx uses hardwearing N150p-X GORE-TEX® fabric.


The Alpha SL has an intelligently designed side zip system. Running the length of the pant, the zipper separates completely, making the pant exceptionally easy to put on and take off as weather shifts. By partially unzipping each side at the top, the system creates a drop seat, a key feature that is truly appreciated when needed. Arc’teryx WaterTight™ zippers are used for a streamlined, snag free profile.


Designed for a wide range of alpine pursuits, the Alpha SL Pant balances essential features with minimal weight. Drawcords at the hem work with a tuck away bootlace hook to provide a secure, full coverage fit, even while climbing. The dual waist adjusters fit comfortably under a pack or harness, and the trim leg fit reduces crampon snags and allows for more effective layering. Fit and ergonomic performance are essential, so Arc’teryx uses a women’s specific design, carefully articulated e3D patterning and a gusset at the crotch for maximum freedom of movement.

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Arc'teryx Fit Guide - Athletic Fit

Standing in as our “Arc’teryx Standard” fit, the complex patterns used utilize anatomical shaping and gussets to enhance motion and eliminate excess bulk. Trimmer than the Relaxed fit with room for a base layer, a light fleece mid-layer and a synthetic or down filled mid-layer.

To find out how to calculate your body measurements, view our Sizing Charts:

Men's Tops | Men's Bottoms
Women's Tops | Women's Bottoms

Arc'teryx Fit Guide - e3D

Ergonomic 3-Dimensional (e3D) patterning brings an additional level of articulation to provide enhanced range-of-motion in our Trim, Athletic, and Expedition fit categories. The application of e3D patterning allows for enhanced mobility for sport-specific activities in challenging environments.


Climbing and alpinism focused pieces: harness compatible length and waistline; chest pockets accessible while wearing a pack or harness; maximum articulation for overhead motions; helmet compatible hoods; drop hem; highest possible durability-to-weight ratio; emphasis on lightweight materials.

SL | Super Light

Uses the lightest weight materials available to provide high weather protection, performance and/or packability, but with the right amount of durability.

Full Feature List

Technical Features
  • Waterproof
  • Breathable
  • Lightweight
  • Compressible and packable
  • Micro-seam allowance (1.6 mm) reduces bulk and weight
  • DWR finish (Durable Water Repellent) helps repel water from fabric surface
  • GORE-TEX® two-layer construction
  • Articulated knees
  • Gusseted crotch
Zippers & Fly Configuration
  • WaterTight™ full separating two-way side zippers
Cuff & Sleeves Configuration
  • Snap cuff-closures
  • Adjustable pant cuff drawcord
  • Lace hook
Waist & Belt Configuration
  • Pull-on style with elasticized waist
Pocket Configuration
  • Note: Our WaterTight™ zippers are highly water resistant, but not waterproof. We do not recommend keeping items in your pockets that may be damaged by moisture
  • Reinforced instep patch


  • N40r GORE-TEX® fabric with PacLite® product technology
  • N150p GORE-TEX® Pro 2L


  • Machine wash in warm water (30°C).
  • Double rinse.
  • Do not use fabric softener.
  • Tumble dry on medium heat.
  • Do not iron.
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