Estremo shoe covers are the warmest at Castelli for extreme conditions. They are lined with Polartec Power Stretch Pro to keep you warm. The external is made with Gore-Tex Infinium fabric for windproof, water protection and breathability. The YKK zip is water resistant and the under foot is high durability.

• Gore-Tex Infinium for windproof water protection with maximum breathability
• Polartec Power Stretch to keep you warm
• Reflective details provide high visibility