La Sportiva Stream GTX hiking boots - carbon/apple green size: 43

Moving fast along alpine ridges and forest trails demands footwear that keeps up with your pace. The La Sportiva Stream GTX in Carbon/Apple Green is built for the fast hiker who wants waterproof protection without sacrificing breathability. Its GORE-TEX® Extended Comfort with Surround™ Technology blocks outside moisture while allowing sweat vapor to escape through the sole, so your feet stay dry during high-output ascents and long descents. The abrasion-resistant mesh upper with thermo-adhesive TPU skeleton and rip-stop inserts provides a secure, durable fit, while the compression-molded EVA midsole with anti-torsion insert delivers stability on uneven terrain. The Frixion® Blue outsole with Impact Brake System™ enhances traction and reduces impact, and the Ortholite® Mountain Hiking 5mm footbed adds cushioning. A traditional lacing system with metal hooks lets you fine-tune the fit for all-day performance.

Key specifications

• Waterproof membrane: GORE-TEX® Extended Comfort with Surround™ Technology
• Upper material: Abrasion-resistant mesh with thermo-adhesive TPU skeleton and rip-stop inserts
• Lining: GORE-TEX® Extended Comfort
• Midsole: Compression-molded EVA with stabilizing anti-torsion insert
• Outsole: Frixion® Blue with Impact Brake System™
• Footbed: Ortholite® Mountain Hiking 5mm
• Weight: approx. 840 g per pair (size 43 EU)
• Closure: Traditional lacing with metal hooks
• Shaft height: Mid-cut
• Toe protection: TPU toe cap
• Gender: Men's
• Size: 43 EU

Why choose it

The Stream GTX stands out with its GORE-TEX® Surround™ Technology, which enables 360° breathability—a rare feature in waterproof hiking boots. This means your feet stay dry from both external moisture and internal sweat, keeping you comfortable over long distances. The combination of a lightweight yet supportive midsole and a grippy outsole with Impact Brake System™ gives you confidence on technical terrain, while the durable upper and toe cap protect against trail hazards. Whether you're tackling a fast day hike or a multi-day trek with a light pack, this boot is engineered to keep you moving efficiently.

Ideal use cases

• Fast hiking and speed trekking on alpine trails
• Light trekking and mountain walking in variable weather
• Day hikes with a light pack where breathability matters
• Approach routes to climbing areas

Good to know

The La Sportiva Stream GTX is a mid-cut boot, offering a balance of ankle support and freedom of movement. It is designed specifically for men and comes in size 43 EU. The Carbon/Apple Green colorway is both functional and stylish, with a TPU toe cap for added protection. The boot weighs approximately 840 g per pair, making it a lightweight option in its category. The traditional lacing system with metal hooks allows for a customized, secure fit, and the Ortholite® footbed provides long-lasting cushioning and moisture management.