La Sportiva Synchro Ski Boots - Men's 5054-379

La Sportiva Synchro Ski Boots - Men's

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Show Description

An alpine touring boot that offer fantastic downhill performance. The Synchro takes all the genius of La Sportiva’s Spectre 2.0 and improves both stiffness and flex. A 2-layer tongue locks together in ski mode but moves freely in touring mode. Carbon reinforcement behind the cuff ups the stiffness at 125 flex, so you get power and precision comparable to a downhill boot. The Pegasus Plus buckle locking system is easy to use and adjust in the field. A thermoformable liner adds warmth and comfort and a Vibram® outsole adds durable grip.

  • Shell has a compact lower made of ultra-lightweight nylon polymer Grilamid®.
  • Cuff is made of Pebax and supported by the carbon-reinforced Grilamid vertebra.
  • Overlap liner is thermoformable, and provides more warmth and comfort when charging hard.
  • 4 Pegasus Plus buckles provide a strong hold and are micro-adjustable for a perfect fit.
  • Booster Dynamic Power Strap® helps further increase the stiffness of the boot.
  • Rear spoiler provides fine-tuning of forward lean angle and foot position.
  • Double Power Grilamid tongue uses interlocking layers to promote flexibility when walking and stiffness when skiing.
  • Tongue position can be adjusted among three positions within a 4mm range, for greater comfort.
  • Compatible bindings are Tech, Alpine touring and TR2.
  • Flex Index of 125 provides great downhill performance.
  • Walk/ski mechanism is easy to operate, even with gloves on.
  • Vibram outsole has 2 compounds to blend grip and durability.
  • Speed step-in locator on sole allows fast positioning into bindings.

Tech specs

Show Tech specs
Ideal for Alpine touring
Boot/binding compatibility

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

  • Alpine touring
  • Tech
  • TR2
Buckles 4
Lower shell material Grilamid
Shell cuff material
  • Pebax
  • 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.

  • Alpine Touring
  • Tech
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.

12, 14, 16º
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