3M dbi-sala 1244630 Shock Absorbing Lanyard, Snap hook at Ends 6 ft. (1.8m) double-leg 100% tie-off with elastic Nomex/Kevlar fiber webbing and snap hooks at each end. ShockWave 2 shock-absorbing lanyards incorporate a unique stretchable design. It offers complete freedom of movement while reducing trip fall hazards, dragging or snagging by expanding to 6 ft. (1.8m) when taut and automatically contracting to 4 1/2 ft. (1.4m) in reaction to the worker’s movements. The design is lightweight and provides added comfort and safety. The unique inner core begins to extend and absorb energy once subjected to a fall and limits the fall arrest forces to safe levels.