TOP CROLL® LChest harness for seat harness, with integrated CROLL L ventral rope clamp The TOP CROLL L integrates a CROLL L ventral rope clamp to transform ASTRO SIT FAST, AVAO SIT and AVAO SIT FAST harnesses into fall arrest harnesses. The foam shoulder straps are widely spaced to reduce neck chafing. When the waistbelt is loaded, they help distribute the load over the shoulders. Detailed description Integrates a CROLL L ventral rope clamp to transform ASTRO SIT