Women's Fit Flop Wonderwelly Short Boots in navy. Natural Rubber Mix upper. Pull on fastening. Wonderwelly Technology. Slip-Resistant Rubber outsole. Ref: AH6399. Wonderful, The Wonderwelly From Fitflop. Using The Science Of Biomechanics, These Boots Are Set Out To Become The World's Most Comfortable Welly. With A Contoured Insole For Natural Alignment, Impact-absorbing Honeycomb Cushioning Heel And High-rebound 'springboard' Ridges At The Forefoot, These Wellies Support You With Every Step And Through Every Muddy Puddle.