Ilse Jacobsen Hornbæk RUB1 Long Rubber Boots combine signature Danish design with waterproof protection and insulated comfort. The RUB1 is built for wet, cold conditions while keeping a refined, laced silhouette. Key attributes: Black | Natural rubber | Waterproof | Insulating sole rated to resist −20°C | Oil-resistant sole | PVC free | Adjustable lacing for calf fit | Full-length side zipper for easy on/off | Warm fleece inner lining | Insulating insole | Full-length outer lacing with silver-tone eyelets / D-rings | Glossy finish | Knee-high (below-knee) shaft | Pull tab at back | Dimensions & fit: Insole length: 22.5–27 cm (size-dependent) | Shaft height: 33–36.5 cm (size-dependent) | Calf circumference: 37.5–42 cm (size-dependent) | True to size | Loose fit | Length: Below-knee | Heel: Flat | Composition & care: 80% Natural rubber | Inner lining: Fleece | Sole: 45% Viscose, 35% Polyester, 20% Polyacrylic | Wipe clean with a damp cloth. Apply rubber oil occasionally to keep natural rubber hydrated. Store indoors away from direct sunlight. Soak laces in warm water with mild detergent and air dry. Do not machine wash.