Good tow systems come in small packages. Kokatat Slipstream Tow Line is a full featured tow system but in the smallest package available so it is more comfortable to wear the 99.999% of the time (when you are wearing it just in case but not actually towing). It comes with the smallest diameter floating line of any tow system (keeping the bulk minimized), an nylon carabiner instead of metal biner (so it doesn't take a huge float to keep it from sinking), a small line-float (thanks to the nylon biner) which keeps the bulk minimized, pull-ball on string for the quick release safety cam-buckle. An internal quick-release on the belt allows you to go from short tow to long tow (letting all the line out; see the red pull-ball at the end of the bag in the photo). The bag opens up like a blanket making it easier to repack the line. 

Note: To reduce the risk of getting speared from behind while towing, there is no bungee spring in this tow system. The 50' of line provides plenty of shock absorption without a spring. However, if you really wanted a spring like some of the old tow systems you could easily add a few feet of bungee cord.

Meets Canadian Coast Guard Regulations as a buoyant heaving line.