- The Hanwag Sirius II GTX is a versatile boot designed for high-alpine mountaineers. As a Hanwag category D boot, is is made for challenging terrain where glaciers, ice, and firn are found. It is suitable for ice climbing.
- The Sirius II GTX retained most of the features of its predecessor, the Sirius GTX. The most prominent differences between the two models lie in the sole system and upper material.
- The earlier version, the Sirius GTX, uses a separate Vibram Alpin outsole and memory plastic. On the other hand, the Sirius II GTX uses a Vibram Alpin Light sole unit.
- The previous iteration uses Bergrind leather that’s known most for being water-repellent. The latest version uses cowhide leather. This material has a rugged appearance.
- Sirius II GTX is suitable for trips in cold regions. It has added insulation in the upper and sole unit which Hanwag promises to help keep users warm even at temperatures as low as –15 °C.
Hanwag Sirius II GTX is available in standard sizes. It fairly runs true to length. The boot is built on Hanwag's Alpin Wide Last. Its wide forefoot zone prevents pressure points which happen during walks and climbs.
The Click Clamp special clamping eyelets allow different lacing tensions in the mid to forefoot region and around the ankle. Its lace-up closure, consisting of D-rings in the midfoot zone and hooks above the ankle, lets the wearer achieve a snug and custom fit.
The Vibram Alpin Light sole unit features a self-cleaning tread in the outsole. The tread helps keep detritus, snow, water and mud off the soles. A debris-free outsole grants sufficient traction on the trail.
Sirius II GTX features a midsole with torsional stiffness. This property limits the twisting and turning of the shoe during hikes and climbs.
The component responsible for shock absorption is the PU wedge. There’s also a PU heel that grants extra cushioning. Also found at the heel and front end of the midsole are crampon notches.
An added TPU tip makes the boot resistant to abrasions. Thermoplastic polyurethane is a material that has wear-resistant properties.
Hanwag’s Sirius II GTX uses a 3 to 3.2 mm thick suede cowhide leather for foot protection and shoe durability. This material is as durable as it is thick. Also, it is less likely to rip compared to other animal skins. It is easy to maintain and has resistance to dirt and water.
The upper has fewer seams to help reduce the risk of rubbing and pressure points. According to Hanwag, a special technique is used to lessen the number of seams in some of their shoes. The cuff is fully-padded to give comfort.
The Sirius II GTX features the Gore-Tex Laminate Duratherm and Sierra, an ultra-lightweight, microporous membrane that provides a combination of waterproofness and optimized durability. According to Gore-Tex, the lining keeps wearers dry while still providing breathability.
Finally, the upper has the Elevated Brim, a rubber rand that goes around the base of the upper. It protects the leather from scree and rocks. According to Hanwag, this feature also helps in increasing the durability and stability of the boot.
- Hanwag Sirius II GTX is a cement-lasted footwear. This technique allows resoling several times. Resoling is the process of removing worn-out soles and attaching or cementing a new sole unit.
- The Sirius II GTX is compatible with step-in crampons (also called rigid step-in, clip-on, or automatic crampons). Step-in crampons provide a secure attachment and are ideal for technical mountaineering, ice climbing, and ski mountaineering.