The rope will automatically roll up when you work or carry it, so it will not become jammy.

[Use]
Only for hanging 1 lanyard for waist belt.
Lanyards for torso belts cannot be used with harnesses.

Specifications:
Lanyard Length: 63.0 inches (1600 mm)
Weight: Approx. 26.5 oz (750 g).
Flat rope: aramid fiber, shock absorber: nylon fiber, hook: steel, hook hanger: synthetic resin, reel cover: synthetic resin.

From the Manufacturer

Waist Belt Lanyard Standard for Single Line Suspension Devices; Lanyard Length: 63.0 inches (1,600 mm); Weight: Approx. 26.5 oz (750 g)