Petzl RING2RING Pro Helmets the REEVE carriage pulley is

the REEVE carriage pulley is an integrated solution designed to simplify setting up rescue systems on tensioned highlines

The front attachment point is positioned to increase comfort when moving

as well as some gear

High quality stainless steel bolt hanger for typical exterior uses

The STRATO helmet is very lightweight and comfortable

Petzl RING2RING Pro Helmets the REEVE carriage pulley isSpecifically designed to be used on sit harnesses with textile bridges, the RING2RING accessory is primarily for use during helicopter rescue. It functions as a second attachment ring in addition to the textile loop, allowing the rescuer to better organize their equipment at the ventral attachment point and making it easier for the winch operator to access the connection point when connecting the rescuer.