Safe and Durable: Made of premium quality natural latex material, the resistance bands offer a smooth and bright appearance and provide superior durability, not easy to crack. Non-toxic and skin-friendly to the human body. Perfect Portability: With a free carrying bag, it is very easy and convenient to take everywhere, perfectly ideal for indoors and outdoors use with the instruction. Extended Length: 600mm x 50mm, longer than normal one from other sellers, allows enough length for your total body extension to enhance exercise in legs, knees, hip and back. Lifetime Warranty: We can provide unconditional lifetime warranty to ensure the long-time enjoyment of your purchase. Please contact us with any questions or concerns - we are here to help.