Back zipper steamer for good water sealing and great ergonomic look and fit. Smooth-cut collar neck line provides unprecedented comfort compared to traditional roll edged collars. Double blind stitched outer seams and single blind stitched inner seams for durability and comfort. Metal main zipper slider is sturdy yet easy to operate. Nylon webbing thumb loop at base of all back zippers for easy donning. Integrated tatex Kneepads offer abrasion resistance.