JOSEF SEIBEL Jasper 50. A men’s waterproof Chelsea boot crafted using high quality leathers and a Top Dry-Tex membrane. The Jasper 50 Chelsea ankle boot has a unique brogue style leather overlay detail on the heel and contrasting elasticated side gussets – creating an all year round smart casual waterproof boot. Cleverly showcasing the distinctive Chelsea features with two elasticated side panels and rear pull tab for easy foot access. Sitting atop a flexible, hard-wearing and lightweight sole with a soft textile lining and a cushioned removable footbed.