You decided to go with a fully customized BCD concept that Aqualung provides with the ModLock technology Rouge Backpack Style BCD so, you started with the air cell and back assembly (see SKU's: UDRRAC, UDRRBA) and now you need to choose a Shoulder Assembly. Made from durable proprietary fabrics, webbing and impact resistant hardware the Shoulder Assembly is available in three sizes for complete customization and will fit any of the air cells and back assembly you choose.The Rouge Shoulder Assembly comes complete with an adjustable cross chest sternum strap equipped with a squeeze-style side-release buckle. Shoulder daisy chain loops and two pre-bent stainless-steel D-rings. Loops and D-rings are for accessory attachments. Pull-dump cord for the over-the-right-shoulder overpressure relief/pull dump valve attached to your bladder air cell. ModLock connectors easily click into place and are simply unlocked with a small tool such as a key or pen. Comes with assembly instructions.