La Sportiva Aequilibrium ST GTX Mountaineering Boots - Yellow/Black, EU 45.5

The La Sportiva Aequilibrium ST GTX is a high-performance mountaineering boot designed for technical terrain, glacier crossings, and demanding trekking. Featuring a GORE-TEX Performance Comfort membrane, it offers reliable waterproofing and breathability to keep your feet dry and comfortable in challenging conditions. The boot combines a water-repellent nylon upper with honey-comb Guard™ reinforcements for durability and protection, while the Vibram® SpringLug Tech outsole with Impact Brake System ensures superior traction and braking on steep descents. With semi-automatic crampon compatibility (B2), it is ideal for mixed terrain and alpine adventures.

Advantages

Excellent ankle mobility thanks to the 3D Flex System Evo™, combined with the Double Heel™ technology for improved downhill braking. The carbon-loaded nylon footbed provides stability and support, while the full rubber rand enhances abrasion resistance. The traditional lacing system with hooks and loops ensures a secure fit.

Suitable for

• Technical mountaineering
• Glacier crossings
• Via ferrata
• Demanding trekking

Key specifications

• Membrane: GORE-TEX Performance Comfort
• Upper: Water-repellent Nylon 60.6 with honey-comb Guard™ reinforcements
• Lining: GORE-TEX Performance Comfort
• Midsole: Semi-cramponable, 6-layer with low-density PU and rubber guard
• Outsole: Vibram® SpringLug Tech with Impact Brake System
• Footbed: Carbon-loaded nylon
• Crampon compatibility: Semi-automatic (B2)
• Weight (per pair, approx.): 1350 g (EU 45.5)
• Lacing: Traditional with hooks and loops
• Ankle mobility: Excellent, with 3D Flex System Evo™
• Heel technology: Double Heel™
• Color: Yellow / Black
• Size (EU): 45.5
• Waterproofing: Yes
• Breathability: Yes
• Gender: Unisex
• Protection: Full rubber rand

Recommendations

For optimal performance, pair these boots with gaiters and semi-automatic crampons. Break them in gradually before long expeditions.