Long Lines are great tools for enrichment walks where you don't want to add leash pressure, practicing recall, or keeping your pup secure in strange environments. Biothane is an ideal material for long lines, as it is durable and easy to clean!
I recommend 1/2 inch widths for long lines, as it can get heavy in the 3/4 inch. I use a 35 or 45 foot line on my adventures and have a D ring end to attach a grab tab handle, or let it drag depending on what foster dog I have!