What puts the wonder into WonderWelly™? FitFlop™ set out to turn an iconic silhouette into the world’s comfiest rain boot with our biomechanically engineered technology. We’ve contoured the sole to evenly distribute bodyweight, filled the hollowed-out heel with our innovative honeycomb design that absorbs the impact of every step, and placed high-rebound micro ‘springboards’ in the forefoot to help put a spring in your step. Here in the short version.