Notice: SCARPA released a new version of their popular Alien boot, which can be found here.

The SCARPA Alien Boots employs some radical technology to obtain a race weight at a reasonable price. With walkability similar to hiking boots and skiability similar to a heavier kit, the Aliens are quickly becoming a go-to boot for skimo racers and light and fast tourers.

SCARPA designed these with a more comfortable last than other lightweight boots, and used a BOA closure system instead of a buckle in the forefoot. This allows you to get a precise fit over your instep without consulting a boot doctor with a heat gun. The laced upper buckle system is integrated into the walk/ski mode switch so you can transition between uphill and downhill modes in one simple step. Once pointed downhill, the Alien Propulsion Tech frame provides a sturdy platform for driving skis harder than you would think for a 2 pound boot.

• Flexible waterproof sheathing around the ankle helps keep snow off the liner.
• A single-throw buckle so you can switch quickly between walk and ski modes.
• Adjustable forward lean allows you to choose your stance at either 9 or 13 degrees.
• Full 60 degree range of motion in walk mode lets you actually run uphill (or down if the need arises).
• Moldable Intuition liners (166g/5.9oz) wrap securely around your foot with a BOA closure system.
• Vibram "UFO" soles are the perfect ride for Aliens, providing 360 degrees of durable traction on sketchy terrain.
• Secure yet comfortable 99mm of forefoot last.