Miller RKN-QC/XXL/XXXLBK Revolution Harness with Kevlar-Nomex Webbing and Quick-Connect Leg Buckles, Black, 2X/3X Rugged, black Kevlar outside and gray Nomex inside provide webbing with superior comfort and durability for harsh working environments Cam Buckles provide easy, one-hand adjustment/release for simultaneous adjustment of shoulder straps PivotLink connection's unique rotary design provides greater comfort in bending/mobility Semi-Flexible ErgoArmor Back Shield minimizes impact from sharp/heavy snap hooks and self-retracting lifelines Self-Contained Integrated Label Pack encapsulates labels minimizing damage and loss