We spent 7.3 hours reading reviews from experts and users. In summary, this is what hikers think:

5 reasons to buy

  • A considerable number of users felt that the price of the Terrealte GTX was on par with its performance.
  • Many reviewers would recommend the pair to their friends.
  • This mountaineering boot was comfortable, according to the majority.
  • An expert approved of its compatibility with crampons.
  • The Terrealte GTX from Aku was favored for its good grip, based on several consumer reviews.

2 reasons not to buy

  • A male mountaineer was disheartened with the Terrealte GTX for leaving him with cold feet. His socks also got wet after crossing small streams even though he was wearing a gaiter.
  • A couple of wearers noted that this boot was not for mountaineering. They said that it only worked well in snow trails.

Bottom line

The Terrealte GTX was well received for being a reasonable deal. Its comfort was enough reason for wearers to share about their pleasant experience with the mountaineering boot. However, a couple of performance issues encountered on trail tarnishes its name. Overall, it may be said that the Aku Terrealte GTX is a pair of footgear that can work in dry and snowy conditions but falls short on extreme mountaineering. 


Cut: High cut
Price: $260
Waterproofing: Waterproof
Weight: Men: 28.6oz
Width: Men: Normal | Women: Normal
Brand: Aku
Material: Leather, Vibram
Technology: Gore-Tex
Small True to size Large
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Expert Reviews

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  • The Italian words terre alte which mean highlands were the inspiration behind Aku’s intended design for the boot.  It was created for classic mountaineering and demanding treks that reach high altitudes. Equipped with technologies to make mountaineering lighter, it has a suede upper integrated with Air 8000 for optimal breathability. It is lined with a Gore-Tex membrane for balanced insulation and waterproofing. 
  • The Internal Midsole System (IMS) and Exoskeleton features work together to provide a cushioned and supportive ride. The composition of the lasting board makes it resistant to twisting, and the custom fit pro footbed makes every step more comfortable. 
  • Providing traction is the Vibram Mulaz outsole. The strategically laid out patterns on the sole allow it to deliver on trails. 

Catered to male mountaineers, the Terrealte GTX is offered in standard width and sizes. It generally runs true to size. Aku crafted this mountaineering boot using the Performance Fit last which is designed to deliver accuracy and sensitivity in rock climbing. Its lace-up closure grants a snug fit. It also includes a pulley system for a more straightforward and hassle-free fit adjustment. 

The Aku Terrealte GTX features the Vibram Mulaz outsole. It has a 360-degree helical tread which aids the mountaineer during ascents and descents. The forefoot area has a flat, broad tip called the Climbing Zone. This type of support grants grip and sensitivity when tackling rocky passages. The outsole also has deep lugs and widely-spaced treads for optimal performance.  This outsole uses the Mont compound, which provides support and durability. 

The midsole of Terrealte GTX uses dual-density PU for optimal comfort and cushioning. Likewise, Aku designed it with a lasting board comprising of 6-4 mm nylon, 10% carbon fiber and a die-cut EVA that gives a right amount of support and torsional rigidity (a quality that prevents twisting of the boot). The removable footbed, Custom Fit Pro, is able to wick away moisture, absorb impact and provide heel and arch support.

This boot is infused with Aku’s proprietary IMS (Internal Midsole System) and Exoskeleton technology. The IMS evenly distributes pressure across the foot by thoroughly conforming to its contours. The insets on the heel and toe make it compatible with crampons. On the other hand, the asymmetrical construction of the Exoskeleton is responsible for pronation control. Its medium-density PU stabilizes and protects the foot, while its lighter PU on the medial side cushions, dissipates shock and renders a high resistance against compression. 

The Terrealte GTX has an upper that combines suede and the 1.8 mm Air 8000. The latter is an air system developed by Aku to ensure optimal breathability in the mountaineering boot. It comprises of a material that increases its level of breathability up to 11 times (or more) than that of a traditionally manufactured fabric, over a 24-hour period.

With the moderately insulated Gore-Tex Performance Comfort, this pair can perform in a broader range of outdoor activities. It keeps the feet dry and comfortable even under changing weather conditions. This membrane allows perspiration inside to escape while preventing water outside from leaking into the boots. 

The high-cut design of the Terrealte GTX is attributed to the micro gaiter to protect against snow and screes. A wrap-around rubber rand, which is deliberately made thicker in the instep, renders additional protection and reinforces the construction of the upper.

The pull tabs on the heel and top of the tongue permit easier on and off. The lacing system has steel roller eyelets for efficient fastening, lace locks or the webbing located near the heel to divide the lacing system into two zones—the front and the ankle area. 

  • The Trail Magazine recognized the Terrealte GTX as Best Value in 2015.
  • This mountaineering boot is compatible with semi-automatic (hybrid) crampons.