Sidi Hiemx Cycling Boots Defy Winter's Bite When the temperature is lower than your tire pressure, you'll want to start wearing your cold-weather riding gear to keep racking up those miles. The Sidi Hiemx Cycling Boots are designed for those riders who generate power on cold days. They feature a durable upper that is layered with a Gore-Tex PFC-free membrane, ensuring the shoes remain water-resistant and breathable so that moisture doesn't build up while riding. Inner Gore-Tex soft fleece keeps the cold out and is a thermal regulator. The sole is engineered to offer the highest levels of grip and prevent constriction that reduces blood circulation so that the body temperature is preserved. Sidi's unique high-density dialing system is designed to resist riding impacts and its Dyneema cable will keep a solid hold for the entire ride. Firmor lateral support ensures greater foot stability during gnarly rides. These shoes are compatible with 2-bolt mountain-style cleats. Features Gore-Tex EPE membrane that is 100% PFC-free and provides waterproofness and breathability Inner Gore-Tex soft fleece keeps the cold out and is a thermal regulator Firmor lateral support ensures greater foot stability during gnarly rides SPECIFICATIONSUpper Material Gore-Tex EPE Membrane Closure type Sidi Dial System Outsole Nylon, Glass Fiber Cleat Compatibility2-Bolt SPDIntended Use Mountain, Cold-Weather Sizing EUUS364375386396. 5407. 541842943104410. 54511. 5461247134813. 54914. 55015 | Sidi | Hiemx Cycling Boot Men's | Size 43 In Black/black | Nylon