APL Athletic Propulsion Labs creates high-performance sportswear for the most extreme weather conditions. , These 'Defender' sneakers have the new 'FutureFoam' midsoles with extended side supports for stability and comfort , Waterproof black TechLoom uppers and interior lining ensure your feet stay dry , Thick 'ULTRACT' outsoles provide traction and durability on difficult terrain Small to size. See Size & Fit notes.