lastic sail tie balls / to combine with shock-cord / elastic cord to make elasticated sail ties. These plastic spheres come in three different sizes.
Pluzluce Strong Elastic Bungee Shock Cord, 32ft 5/32 (4mm) Stretch String Rope, Marine Grade Kayak Tie Down Straps Used for Boat, Camping, Trailer Strap, Shoe Laces, Crafting, DIY Projects (Black) :
Calaméo - The Complete Sailing Handbook
10pcs Bungee Ball Cord Ends Elastic Rope Tarps Canvas Tarpaulin Flagpole Ties Lace Fixed Boat Pole Camping Tent Accessories - AliExpress
Box of 1000 Elastic Scaffold Bungee Cords Toggle Ties for Scaffold Sheeting - China Elastic Bungee Ties, Toggle Ties
I found this at a marching band competition whilst cleaning up trash. It is make of a very stretchy black cord with a translucent slide-able piece. Then there is a plastic orange
Rope - Binks Marine
Gripwell Assorted Length Tarp / Canopy Bungee Cord With Toggle Ball - 12 Pack - Bunnings Australia
What types of rope should be used to practice tying knots? - Quora
Bungee Cord - Shock Cord JT'S Outdoor Fabrics Canada
Bungee Shock Cord - Bungee Rope
The best knots to use for bungee cords - The Bungee Store
Yacht Bungee l Sailing Shock Cork l Shockcord
Double Ball Bungy Sail Ties, Elastic Sail Ties