La Sportiva Aequilibrium ST GTX Mountaineering Boots - Lime Punch/Carbon - Size 43.5

The La Sportiva Aequilibrium ST GTX is a technical mountaineering boot designed for high-altitude trekking, glacier crossings, and demanding alpine terrain. Combining lightweight construction with robust protection, it features a water-repellent nylon upper with Honey-Comb Guard™ and TPU mudguard, a GORE-TEX Performance Comfort lining for waterproof breathability, and a semi-cramponable nylon and carbon midsole with external protective TPU film. The Vibram® SpringLug Tech outsole with Impact Brake System™ ensures superior traction and downhill braking. With a precise ergonomic fit, hook-and-loop lacing with integrated bellows, and a Double Heel™ design for smoother strides, this boot offers exceptional performance and comfort on technical routes.

Advantages

Lightweight yet durable construction with GORE-TEX waterproofing and breathability. The Vibram® outsole provides excellent grip on mixed terrain, while the semi-cramponable sole allows for use with semi-automatic crampons (B2). The Double Heel™ technology enhances downhill control and reduces fatigue.

Suitable for

• Technical mountaineering and alpine climbing
• Glacier crossings and high-altitude trekking
• Mixed terrain with snow, rock, and ice

Key specifications

• Upper: Water-repellent Nylon 60.6 high tenacity with Honey-Comb Guard™ and TPU mudguard
• Lining: GORE-TEX Performance Comfort
• Midsole: Semi-cramponable Nylon and Carbon, PU foam with external protective TPU film
• Outsole: Vibram® SpringLug Tech with Impact Brake System™
• Crampon compatibility: Semi-automatic (B2)
• Waterproof: Yes
• Breathable: Yes
• Lacing: Hook and loop with integrated bellows
• Footbed: La Sportiva Ergonomic
• Weight: Approx. 600 g (half pair, size 42)
• Resoleable: Yes
• Origin: Made in Italy

Recommendations

For optimal performance, pair with semi-automatic crampons and gaiters. The boot runs true to size; if between sizes, consider sizing up for thicker socks.