The Petzl Nitro Shock-Absorbing Sling reduces the impact force exerted on protection in the event of a severe fall. Improves security from dubious gear, placements, and dislodged pieces. Energy-absorbing device activates at 2.5 kN, and holds to breaking strength of 22 kN. Nylon material; Velcro tab prevents branches from hanging down and catching on other gear. Size 3 Nitro reduces impact up to 50% for maximum energy reduction. Size 3 dimensions: 16 cm. CE/UIAA certification.