La Sportiva Aequilibrium ST GTX Mountaineering Boot - Yellow/Black - Size 43.5 EU

The La Sportiva Aequilibrium ST GTX is a high-performance mountaineering boot designed for technical alpine terrain, glacier travel, and high-altitude trekking. Combining a lightweight construction with robust protection, this boot features a GORE-TEX Performance Comfort membrane for waterproof breathability, a Vibram® SpringLug Tech outsole for exceptional traction, and a semi-automatic crampon compatibility (B2 rated). The yellow/black colorway offers high visibility on the mountain.

Advantages

Lightweight yet durable design with water-repellent nylon upper and abrasion-resistant zones. The Double Heel™ technology improves downhill braking and provides a smoother stride. Full rubber rand protects against rock abrasion. Ergonomic fit ensures precision and comfort during long approaches.

Suitable for

• Technical mountaineering
• Glacier travel
• High-altitude trekking
• Mixed terrain with snow and rock

Key specifications

• Membrane: GORE-TEX Performance Comfort
• Upper: Water-repellent nylon 60.6, HoneyComb Guard™
• Lining: GORE-TEX Performance Comfort
• Midsole: Polyurethane foam with TPU inserts, rubber rand
• Outsole: Vibram® SpringLug Tech
• Crampon compatibility: Semi-automatic (B2 rated)
• Weight (per boot, size 42 EU): 630 g
• Lacing: Integrated lacing system with hooks and loops
• Fit: Ergonomic, precise
• Flexibility: Medium-stiff
• Insole: La Sportiva Ergonomic
• Color: Yellow / Black
• Size (EU): 43.5
• Construction: Double Heel™
• Protective rand: Full rubber rand

Recommendations

Ideal for mountaineers seeking a lightweight, technical boot that performs well on mixed terrain. The semi-automatic crampon compatibility allows for use with a wide range of crampons. Ensure proper fit by trying on with mountaineering socks.