The 247 Arc-1 Runner Winter in Steel is a *performance-engineered *evolution of our signature runner, designed for cold, wet, and unpredictable conditions. For the first time, the Arc-1 integrates a Sympatex® waterproof membrane - a high-performance technology developed to deliver complete weather protection without sacrificing breathability. The Sympatex® bootie lining forms a sealed barrier against water, while its non-porous structure allows heat and moisture to escape, keeping your feet dry and comfortable in all environments. The upper combines anti-siphon mesh and TPU panelling with waterproof sealed seams and a reinforced mudguard for durability. A speed lacing system with toggle adjustment ensures a secure fit, while the supercritical foam insole delivers lightweight cushioning. Finished with a faded spray EVA midsole and On a Mission tread outsole for traction across variable terrain, the Arc-1 Winter is built to perform whatever the conditions. Weight: 355g (Half Pair UK 8)Heel Drop: 7mm