Titan™ II Non Stretch Harness, Back Side D Rings, Univ (Lg XL), Friction Shoulder Mating Chest Tongue Leg Buckles ORS NASCO rollers and more 50 state VOC compliant rollers and more 50 state VOC compliant Brass construction provides long service life Non interchangeable oxygen and fuel gas connectors Instant closure on reverse flow check valves Spring loaded locking mechanism responds to fingertip action and achieves a gas tight connection Double seal socket connection on second seal Designed for more comfort and better fit with lighter strategically placed padding that provides optimal airflow while working at heights Easier vertical adjustability that stays in place Back strap increases safety by preventing roll out in the event of a fall Oversized ID tags provide quick and easy harness size identification