They are made from super elastic latex and braided using polypropylene.
eBay
Adjustable Yoga Mat Strap with Velcro Fastener, Non-Slip Exercise Accessories Storage Cord, Durable Stretch Bungee Tie Hook Loop
Aliexpress UK
The hooks are coated to help prevent scratches and maintain a firm grip under tension during transport or storage. 8 mm Heavy Duty Elastic Rope.
eBay
Heavy Bungee Fitness Kit Cord Upgraded For Home Gym Yoga Bungee Rope Gravity Bungee Training Pro Tool for Home Gym Studio
Aliexpress UK
The combination of utility and visibility make these the ultimate multi-use bungee cord solution. Set features coated, scratch resistant steel hooks and multi-strand, top quality rubber cords. Durable rubber & latex cords - Each cord is constructed from high quality double braided rubber and latex, ensuring superior strength and stretch as needed, color coded by length for convenient selection.
eBay
2M Z-Hook Lawn Mower Train Engine Brake Wheel Drive Throttle Cable Cable Garden Power Machine Cable Cable Tie Repair Kit
Aliexpress UK
Bungee Cords Size Details J Hooks Included. Strong and Elastic Material. Rest assured we will handle your query as quickly as possible and will aim to respond within 24 hours.
eBay
Z-hook Lawn Mower Train Engine Brake Wheel Drive Throttle Cable Z-hook Lawn Mower Train Engine Brake Wheel Drive Throttle Cable
Aliexpress UK
【Multifunctional carabiner bungee cord】 The two latches of the bungee cord are strong and not only suitable for camping luggage racks, moving cases, boats and bike anchors.
eBay
Metal Hook Rust Proof Hanger Wall Hooks Hangers For Water Air Hydraulic Hose Ropes Extension Cords Garden Hooks
Aliexpress UK
【Wider Flat Design】 The flat tie-down strap with 2.5 cm wide hooks is ideal for distributing pressure to a larger load surface. Compared with ordinary round bungee cords, durable bungee cords have a flat design to prevent cargo boxes from slipping, dents and cuts.
eBay
Cable Tie Repair Kit Z-hook Lawn Mower Train Engine Brake Wheel Drive Throttle Cable Lawnmower Brake Wheel Drive Throttle Cable
Aliexpress UK
【Elasticity Wider Flat Design】With a flat design can prevent slippage and improve cargo safety.The wide bungee rope with hooks with 3cm width and 4mm thickness, very suitable for dispersing the pressure on a large cargo surface area,Compared to an ordinary round bungee cord, the heavy-duty a flat design can prevent sliding, denting, and cutting into cargo boxes.
eBay
Voltsify 48in Bungee Cords Foldable Round Trampoline with Adjustable T-Handle Bar
Aliexpress UK
Bottle not included. Heat Resistant Latex Rubber Elastic.
eBay
150KG All Terrain Stair Climbing Cart Portable Hand Truck With Bungee Cord Folding Trolley For Upstairs Cargo With Bag 6 Wheels
Aliexpress UK