Womens Fit Flop Wonderwelly Short Boots in navy. - Natural Rubber Mix upper. - Pull on fastening. - Wonderwelly Technology. - Slip-Resistant Rubber outsole. - Ref: AH6399 Using the science of biomechanics, FitFlop set out to turn an iconic silhouette into the world's most comfortable welly. These game-changing waterproof boots are ultra-light, flexible, supportive. Unbeatable for long walks, here in the short version.