The Hollis Gear (HTS) Harness Technical System can Easily-Switched from a Single Tank Soft Pack to a Dual Tank Back-Plate System, the Modular Capabilities of the HTS may be personalized to your needs. This Streamlined Modular Harness System has a Comfort Back Pad with Lumbar Support and Stainless Steel D-Rings on Shoulders, Waist and Crotch Strap for Accessory Attachment. The Waist Strap, Crotch Strap and Shoulder Straps are manufactured from Durable 2" (5cm) Nylon Webbing for Strength and Long Life Performance.