Core: multi-strand elastic
Normal shock cord, elastic, bungee, whatever you want to call it.
Recommended 505 Applications:
"It's hard to find someone who puts more care into your boat than you do. I love going out to race in 30 knots on San Francisco Bay knowing that my boat is going to hold together. How do you put a price on that peace of mind?JB Turney, USA 9042