An agile and lightweight mid-cut boot, the Aequilibrium Hike GTXA(R) is the perfect addition to the Aequilibrium family for mixed-terrain hiking. The synthetic fabric guarantees a lightweight and breathable feel without sacrificing protection and durability, thanks to the abrasion-resistant welt in the most highly exposed areas. We tested these boots! You can read our review here. a Exceptional walkability thanks to the innovative Double Heel(TM) constructiona 3D Flex System EVO(TM) directional articulation for contoured, protected ankles: provides stance control and perfect ankle mobilitya VibramA(R) Spring-lug outsole with Impact Brake System(TM) for greater break force control and precisiona BluesignA(R) and OEKO TexA(R) certified ePE Gore-TexA(R) membrane and abrasion-resistant welt to tackle any terrain and extreme weather conditionsa The resoleable tread extends the life of the product and ensures the durability of the sole Specs: ITEM: ZFHS137SIZES: 37 - 47.5 (Half Sizes)WEIGHT: 480 g / 16.9 oz (Half Pair)UPPER: Anti-abrasion and water-repellent fabric / Mesh Collar & 3D Flex Ankle System Evo(TM) / Recycled Laces / Fabric reinforced heel & toe countersLINING: BluesignA(R) Certified ePE Gore-TexA(R) Extended Comfort / Air Mesh Collar INSOLE: OrtholiteA(R) Hybrid with 5% recycled rubber + 15% production waste foamMIDSOLE: 5mm Polypropylene Stiffener / Polyurethane foam with anti-abrasion TPU filmSOLE: VibramA(R) Spring-Lug w/ PU foam lining and Impact Brake System(TM)LAST: Aequilibrium FIT: MediumPROTECTION: 6/10STABILITY: 8/10STIFFNESS: 6/10