Brand HanWag. Almost new. Membrane, waterproof, insulated, with a durable sole. Not used for trekking, worn a few times in the city. In perfect condition, after washing. Insole 24.5 cm, considering that trekking shoes should be 0.5-1 cm larger, they will fit size 36.5-37 (23-23.5 mm) for a narrow foot. Size 38 will be small. Please feel free to ask any questions.