La Sportiva Aequilibrium ST GTX Women's Trekking Boots - Black/Aqua, Size 40.5

The La Sportiva Aequilibrium ST GTX is a technical mountaineering and demanding trekking boot designed for women. Combining lightweight construction with robust protection, it features a Gore-Tex Performance Comfort lining for reliable waterproofing and breathability. The boot is built on a precise, low-volume last for a secure fit, making it ideal for technical terrain and via ferrata.

Advantages

Lightweight yet durable construction with HoneyComb Guard™ inserts and TPU thermal adhesive film for abrasion resistance. The Vibram® SpringLug Tech outsole with Impact Brake System™ provides excellent traction on mixed terrain. The 3D Flex System Evo™ allows natural ankle movement while maintaining support. Semi-automatic crampon compatible (B2 rated) for glacier travel and winter mountaineering.

Suitable for

• Technical mountaineering and alpine climbing
• Demanding trekking and backpacking
• Via ferrata and mixed terrain
• Winter hiking with crampons

Key specifications

• Gender: Women's
• Waterproofing: Gore-Tex Performance Comfort
• Upper: Water-repellent fabric, HoneyComb Guard™ inserts, TPU film
• Lining: Gore-Tex Performance Comfort
• Insole: Carbon-loaded nylon
• Midsole: Polyurethane foam, rubber shell, Double Heel™ geometry
• Outsole: Vibram® SpringLug Tech with Impact Brake System™
• Crampon compatibility: Semi-automatic (B2)
• Lacing: Hook and loop integrated with upper
• Flex system: 3D Flex System Evo™
• Weight per boot (EU 38): 515 g
• Color: Black / Aqua
• Size (EU): 40.5
• Protection: Integrated rubber rand, TPU toe cap

Recommendations

For optimal performance, pair with gaiters and semi-automatic crampons. The precise fit suits narrow to medium feet. Break-in period is minimal due to the flexible construction.