Scarpa Alien RS - Unisex 5054-543

Scarpa Alien RS - Unisex

Free shipping for this item
Free store pickup available at some stores: inside or at the storefront

Rocksolid Guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, undergarments and swimwear excluded).

Really. If it's not up to snuff after you use it (a couple times) you can still bring it back.

It lasts longer than 30 days, but not forever. We'll be fair about it. We're all members here.

Price match guarantee

Found a better deal in Canada? Up to 30 days after purchase – we’ll match it.

If you see a lower price for this exact item advertised online, in print or in a store, give us a call at 1 (888) 847-0770.

If it’s identical, brand-new, in stock, and sold and shipped by a Canadian-based retailer, we’ll match that price.


Show Description

Successor to the original Alien, the RS is a specialized randonee racing or lightweight, traverse-oriented touring boot. Designed for travelling at warp speeds, the Carbon Grilamid® construction is lighter, stiffer, and offers better skiing performance than the previous model. A good choice for the light and fast minimalist or race specialist. At about 890g per boot, these won't hold you back from your goals.

  • Carbon Grilamid® LFT shell and cuff has an incredible power to weight ratio.
  • 3D Lambda Torsion Frame increases lateral stability and downhill performance.
  • Speed Cam Lock ski walk mechanism lock the boot in ski mode and tighten the cuff in one motion.
  • Boa® system takes care of the shell tightening in a quick and precise way.
  • Zippered gaiter ensures that water and snow stays out of the boots.
  • Compact nose ensures crampon compatibility.
  • Intuition Cross Fit Tour liner provides lightweight comfort out of box that can be thermoformed for custom fit.
  • Forward lean can be adjusted to 7, 9, 11 or 13 degrees.
  • Vibram UFO RS rubber sole provides grip and control when off your skis.
  • Compatible with tech bindings only, not compatible with step-in bindings.

Tech specs

Show Tech specs
Weight 1.78kg (27)
Ideal for
  • Alpine touring
  • Ski mountaineering
Boot/binding compatibility

The boot and binding systems must match for best performance and safe use.

Buckles 1
Lower shell material
  • Grilamid
  • Carbon fibre
Shell cuff material
  • Grilamid
  • Carbon fibre
Sole type

Alpine Touring: with tread; compatible with DIN touring bindings. Alpine Touring Tech (Tech): with tread; compatible with G3 Onyx and Dynafit. Downhill: without tread; compatible with freeride/downhill bindings.

Forward lean

Forward lean affects a skiers balance. Some boots have a set forward lean angle; some are adjustable. Less lean places your knees in a more upright (almost standing) position, whereas more lean positions your knees forward over the ball of your feet.

7, 9, 11, 13º
Range of motion

The range of motion of the boot when in hike mode.

Flex index

Indicates how stiff the boots are when flexed forward. Flex ranges from 50 (soft) to 130 (very stiff). Note: There is currently no industry standardized test.

Last width

The width of the interior of the boot shell across the widest part of the forefoot.

Lace-up option No
Thermoformable inner boot Yes
Hike mode

A mechanism that allows to release the boot cuff to switch to tour mode.

Made in Italy