I tell my housesitters to never leave Nemo tied up to anything. Ignoring the obvious risk he'll pull whatever you've tied him to apart, Nemo only takes a few seconds to chew his way free of most fabric and some braided metal cables. This leash holds up better than most.
The woven "mountain climbing rope" takes a bit more mastication and chewing on than a normal ribbon style one. This extends the time you can turn your back from approximated 90 seconds to perhaps 4 minutes. If I go for 5 minutes, I will usually find a Great Pyrenees wandering close to the nearest source of food.
The rope is moderately reflective. The handle comfortable. The clip heavy duty. This is a pretty good leash for big dogs.