Ilse Jacobsen Hornbæk RUB2 Rubber Ankle Boots pair waterproof natural rubber construction with a heat-insulating insole for reliable wear in wet, cold conditions. Key attributes: Dark indigo | Natural rubber | Waterproof | Temperature resistant to -20°C | Non-slip / anti-ice EVA sole | PVC-free | Lace-up closure | Back D-ring pull tab | Heat-insulating insole | Ankle-length shaft | Metal eyelets | Decorative D-ring at back | Gusset at inner lace area to prevent water entry | Dimensions & fit: Loose fit — check size guide | Composition & care: Natural rubber | EVA sole | Treat once a month with Ilse Jacobsen special oil to preserve colour and prevent cracking.