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Winter protection without the weight of a traditional mountain boot
Mammut says:
Designed for fast missions on technical cold-weather terrain. These waterproof hiking shoes feature a Vibram ICETREK outsole for high-level grip on icy ascents and snow-covered routes. GORE-TEX Duratherm insulation protects against the cold to keep your feet warm when temperatures drop. A high rebound 5% recycled EVA foam midsole combines with an Ortholite insole for extra comfort and cushioning on longer hikes. The abrasion-resistant ripstop upper features a zippered fastening with a lacing system underneath for an adjustable fit. With a rocker-shaped sole and steadying Mammut Basefit System, the Aenergy Mtn Mid Winter GTX shoes deliver lightweight performance and rugged winter protection.
Our Verdict
The Aenergy Mtn Mid Winter GTX is built very specifically for cold-weather hiking, and for me the Weather-Shield upper is the main talking point. The zipped gaiter covers the laces and raises protection around the ankle, helping keep out snow, wind and debris without needing a much heavier boot.
Underneath, 220g GORE-TEX Duratherm insulation adds proper warmth, while the Vibram ICETREK outsole is designed to retain grip in low temperatures. At 476g per UK8 shoe, it is also relatively light for this level of winter protection.
The cushioned, rockered platform feels closer to modern hiking footwear than a stiff mountaineering boot, though the insulation and gaiter make it far more specialised for genuinely cold conditions.
- Reviewed by Ultralight Outdoor Gear
Features
- GORE-TEX® Duratherm™ Insulation: premium waterproof membrane with integrated 220g insulation for warmth in freezing conditions without added bulk
- Weather-Shield upper: abrasion-resistant textile wrapped in a protective zip-up gaiter to shield your feet from wind, snow, and ice
- Base Fit Technologie: a custom-engineered midfoot structure and lacing system secures the foot for stability and arch support over long distances
- 3D Heel Foam™: comfort-enhancing heel and tongue foam pods wrap the ankle for a secure fit
- Vibram® ICE TREK outsole: engineered specifically for maximum grip and traction on icy, frozen surfaces and low-temperature environments
- Minimalist design for a modern alpine aesthetic
- Ortholite® insole for long-lasting cushioning and step-in comfort
- Mammut CORE midsole: Lightweight EVA foam with 5% recycled EVA provides responsive cushioning and long-distance comfort
Specifications
- Weight per UK8 shoe: 476g
- Weight per UK10 shoe: g
Material & Construction
Soles
- Vibram® ICETREK
- Vibram Megagrip
Material
- Non Sew TPU
- Technical mesh
Lining
- GORE-TEX Duratherm Insulated Comfort Footwear
