Ilse Jacobsen Long Rubber Lace Up Wellington Boots RUB1.Lace-up rain boot with fleece lining and rear pull loop.Contrast logo on side.Outer Material: Rubber.Inner Material: Textile.Sole: EVA.Closure: Speed-Laces.Heel Type: Block Heel.Material Composition: Rubber.Fit Type: Fits Half A Size Larger.Shoe Width: Normal.The iconic laced rubber boots by Ilse Jacobsen. These knee length rain boots features a decorative D-ring at center back and logo on the shaft. These wellingtons are made of sustainably harvested natural rubber and have been cut by hand. This material can withstand temperatures down to -20 degrees Celsius. The rubber composition is 80% pure, natural rubber and 20% secret formula. Entirely PVC-free, our boots contain no animal by-products. If not treated regularly, natural rubber will develop a white surface over the years. This is simply because the rubber will lose its essential oil. To keep your boots in great condition for many years to come, we recommend that you treat them once a month with our oil.