The ASAT (all season, all terrain) leash is truly the only leash you will ever need. The innovative material feels and looks like leather, but does not require any maintenance like leather does. That means, no breaking-in period, no leather-oiling, no worrying about getting the leads wet or dirty. They are more comfortable on your hands that nylon leads of the same length and width and don't "fuzz out" like nylon leads do. - water, mildew, and rot proof. - 500 lbs. breaking strength on 1/2” - 750 lbs. breaking strength on 3/4” - No maintenance needed - easily cleaned I have had my ASAT lead for over two years now and it's holding up great. If it gets dirty, all I have to do is dip it in water or wipe it with a damp cloth, and it's as good as new. They also come in many different styles, including trial / police leads with a floating ring in the handle, which is an extremely versatile design.