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Experts are hikers, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

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87 / 100 based on 6 expert reviews

  • 80 / 100 | Climbing Gear Reviews

    They are packed full of features, are comfortable and have a ‘climb all day’ feel to them.

  • 88 / 100 | Active Traveller

    A technical B3 crampon-compatible climbing boot, the Serai GTX is designed to take users to higher elevations and onto ice and rocky ridges.

  • 100 / 100 | Outdoors Magic

    Aku has been producing eco-friendly, locally-sourced footwear for over 100 years and the Serai GTX is one of its most technical models yet.

  • 90 / 100 | Peak Mountaineering

    They look great, perform superbly and offer great value.

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  • The Aku Serai GTX is a high-cut boot that’s built for technical climbing trips. Its upper is made of a combination of sturdy kevlar, nylon, and microfiber fabric materials. The upper is lined with layers of Primaloft and Gore-Tex Insulated Comfort for water protection and thermal insulation.
  • The boot’s midsole incorporates a dual-density polyurethane (PU) exoskeleton for cushioning and stability. Its Vibram Nepal outsole is engineered to deliver traction on snow, ice and rocky ridges.

The Serai GTX is a high-cut, unisex mountaineering boot which is offered in a regular width profile. Women must go 1/2 size down to get the correct fit. This Aku product comes in a range of whole and half sizes. The gear’s lace-up closure system is paired with a velcro strap on the collar to achieve a secure and personalized fit. Moreover, the product fairly runs true to size.

This mountaineering boot is built on Aku’s Performance Fit last. Its fit is designed to give the wearer accuracy and perception needed for ice and rock climbing.

Aku’s Serai GTX features a resoleable Vibram Nepal to render traction while being resistant to wear. The diamond-shaped lugs are designed to grip on uneven terrains filled with ice and snow. The outsole’s heel brake delivers improved control in downhill conditions.

This high-cut mountaineering boot uses Aku’s patented Internal Midsole System (IMS) to create a cushioned and stabilized ride. The gear’s exoskeleton construction contains a medium density PU layer for stability and protection. It also has a lightweight PU inner part for cushioning and shock absorbency.

The Serai GTX’s carbon fiber lasting board is outfitted with a honeycomb alum core to make it stiff. Its custom fit pro alum footbed grants arch support and underfoot comfort to the wearer. Also, the midsole’s heel and toe welts allow crampons to be attached to this boot.

The Aku Serai GTX is equipped with a durable upper made of kevlar, nylon, and mycrofiber. These materials grant the boot with sturdiness and resistance to abrasion. Its upper is lined with a layer of Primaloft to keep the user’s foot warm in cold temperatures. A Gore-Tex Insulated Comfort membrane is also embedded within the upper to seal out water while adding extra insulation.

The Serai GTX’s upper is reinforced with a Liba Smart PU rand for an improvement in durability. Its closure system employs metal eyelets and hooks to adjust the fit. A gaiter is integrated into the collar to provide ankle support while keeping debris out. Also, a pull tab is positioned at collar’s rear for an easy on and off.

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