Men\'s Mountaineering Boots - Boreal Siula Mountaineering Boot - One Color

Men's Mountaineering Boots - Boreal Siula Mountaineering Boot - One Color

$223.80  $143.46
Save: 36% off

  • Model: X7NX381
  • 221 Units in Stock
  • Manufactured by: Boreal

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Boreal Dry-Line waterproof and breathable membrane
Fully sealed seams
Waterproof Cordura lining (outer boot)
Triple-layer Thinsulate insulation
6mm EVA foam insulation layer (outer boot)
Integrated outer gaiter with waterproof Tizip closure
Inner boot with heat-reflective aluminum layer
Tanka and hook-and-loop closure system (inner boot)
Carbon composite midsole with PU and EVA layers
Vibram Teton sole
Automatic crampon compatible
Item #BRF000R

From winter ascents of the Eiger to 7000-meter climbs in the Himalayas, Boreal's Siula Mountaineering Boot delivers the performance necessary when climbing in high and cold alpine environments. In terms of design, the Siula was built to sit between Boreal's Everest-grade G1 Expe boot and its light-and-fast climber, the G1 Lite, making the Siula a great choice for most alpine endeavors. Its triple-layer construction consists of an integrated outer gaiter, outer boot, and inner boot for dependable warmth, resistance to wear, and all-season versatility.

The outer boot's outermost layer is composed of two materials, both of which are breathable and highly resistant to wear. The outer gaiter is secured via the waterproof Tizip closure. Six millimeters of EVA foam acts as an insulating layer, which is backed by a waterproof and breathable layer of Cordura nylon for added protection against moisture. Boreal even added a light, but durable TPU rand along the outside gaiter for added protection against rock, ice, snow, and crampon bails. The inner boot features triple-layer Thinsulate insulation to help eliminate cold spots and is supported by a heat-reflective layer of aluminum film to direct radiant heat back towards the foot. The sole of the inner bootie features a textured TPU surface to reduce slipping for a more secure and reliable climbing feel.

When it comes to climbing, the Siula is tough to beat. The stiff, supportive midsole offers a secure and stable platform to climb with, but is also light thanks to a carbon composite material. Boreal then weaved in layers of shock-absorbing PU and EVA to help absorb vibration when toeing in on sections of bulletproof blue ice. For ease of use on the mountain, Boreal added toe and heel welts to the Siula, making it compatible with automatic crampons. The whole boot is built on an aggressively lugged Vibram Teton sole for a sure-footed feel when climbing without crampons.

Upper Material:[outer boot] Teramida textile, Lorica (synthetic leather), neoprene, [inner boot] PU, heat-reflective aluminum
Waterproofing:[outer boot] Cordura lining, [inner boot] Boreal Dry-Line membrane (3-layer), fully sealed seams
Insulation:[outer boot] 6mm EVA, [inner boot] triple-layer Thinsulate
Removable Liner:yes
Closure:Tanka, hook and loop
Midsole:carbon composite, PU, EVA
Sole:Vibram Teton
Style:super-gaiter boot
Crampon Compatibility:automatic
Shaft Height:mi
Claimed Weight:[single, size 8] 2 lb 13 oz
Recommended Use:alpine & expedition