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Bluestrait ES is a safe winter boot with non-slip grip. Fiberglass-reinforced grip inserts embedded in the Fiberbrake outsole ensure that its load-bearing zones provide an unparalleled level of traction. The specially formulated winter rubber compound remains, soft, pliable and grippy even in sub-zero temperatures.In addition, the aggressive tread pattern on the outer edges of the outsole provides excellent traction in loose snow or slush. And the 3D construction of the IPU midsole ensures a perfect fit and allows the foot to roll efficiently for a smooth ride. Its three-dimensional structure is made of stabilizing 3D injection molded polyurethane (IPU) and expanded polyurethane (PU). The raised outsole edge provides more support on all sides and in the heel. To keep your feet dry, the Bluestrait ES has a PFC-free PU membrane with a sturdy three-layer laminate construction. The outside of the upper has an additional PFC-free waterproof treatment, and its soft inner lining fabric is made from 70% recycled polyester. The comfortable and breathable insole is made up of a combination of odour-fighting, insulating merino wool (no mulesing) and fully recycled PU foam made from offcuts. Long-lasting and resource-saving: we combine high-quality natural Perwanger suede leather with terracare® nubuck leather from the Josef Heinen tannery and 100% recycled upper fabric.

• Cushioning and stabilizing midsole with unique 3D internal structure
• Fiberbrake outsole with fiberglass grip inserts, special winter rubber compound and tread pattern
• Durable, insulating and breathable insole made of merino wool (no muslin) and recycled PU foam
• Hydrophilic PFC-free EcoShell PU membrane in a three-layer laminate
• Materials: High quality Perwanger leather with a robust polyamide upper fabric