This 1/2" width leash combination is soft and can be very light. Medium includes the Metallics. It works well on a dog that doesn't pull alot, For agility it doesn't  weigh heavily.  I use it on my 30 lb Giant Rat Terrier.  He can pull hard but hasn't stretched it out much at all. 

Leash Length
Color 1
Color 2
Ear to Ear Collar size
wide flat collar? Yes or NO