La Sportiva - Trango Tech GTX - Mountaineering boots. Material type: synthetic|Other material information: abrasion-resistant fabric; Thermo Tech Injection|Closure: lacing|Sole: Vibram|Sole: climbing zone|Crampon Compatibility: compatible with semi-automatic crampons|Midsole: Anti-shock PU midsole; Protective PU Skin; TPU rear insert for crampons|Reference size: medium-sized pair|Extras: reinforced heel|Extras: rock guard|Extras: pull on loops|Misc: Outsole: La Sportiva Cube (by Vibram); Insole: 4 mm PPE, raised in anti-torsion area Laces down to toes; 3D Flex system; Impact Brake system