CHANNEL FLEXDRYLOCK ANKLE SEALS – LOCKS WATER OUTQUICK-DRY FIBERS – STAYS DRIERPULL UP ANKLE LOOP – EASY ENTRYTAITEX OUTER SEAM – DURABILITYERGO STRAP DESIGN – LESS PRESSURE3 DIMENSIONAL FOOT MOLD – CONTOURED FITSINGLE RUBBER BOTTOM – DURABILITY WITH BOARD FEELALL NEW CELLIANT BLACK – STAYS WARMERTAPED SEAMS – DURABILITY