The womens Black Diamond Siren harness balances comfort and breathability so you can perform your best on challenging sport climbs and lightweight trad ascents. Bullhorn-shape waistbelt with Dual Core XP ConstructionTM features 2 separate bands of webbing and a supportive polyester insert to distribute pressure. Waistbelt has a breathable mesh shell and a soft, quick-drying lining that help keep you comfortable on summer days. Legs loops are constructed from single strands of full-width high-tensile nylon for excellent support breathable mesh shells and wicking linings manage moisture. Lightweight aluminum Forged Speed Adjust buckle at the waist is prethreaded for quick and secure 1-handed operation buckle is easy to adjust yet wont slip when climbing. trakFIT leg adjustments feature simple slide adjusters along the leg-loop webbing trakFIT is quick and easy to adjust and requires no doubling back. 4 extra-large, pressure-molded polyethylene gear loops are reinforced with nylon webbing to provide excellent racking space with high strength. Abrasion patches are 20 times more durable than standard nylon fabric. Rear elastic straps on the Black Diamond Siren harness adjust easily and can be released.