The 
NUPROL NP TWO POINT SHOULDER STRAP SLING GREEN
 is a durable, adjustable bungee sling made from heavy-duty 1000D Cordura Nylon that can also convert into a single-point sling. 
 
Key Features and Material
Material: Constructed from heavy-duty 1000D Cordura Nylon with solid polymer main buckles.
Color: Available in green (referred to as Olive Green or OD Green by some retailers).
Design: Features flexible bungee supports at each side of the sling to absorb shock and take force off your shoulders when the weapon is dropped.
Versatility: Can be used as both a two-point and a single-point sling by connecting the metal clasps to a D-Ring.
Attachment: Includes H&K style metal clips for secure attachment to weapon sling points, along with two strong cloth adapters for smaller sling loops.
Adjustability: It is fully adjustable and features quick release buckles for fast detachment of the weapon or removal of the entire sling, even while wearing gloves.
Length: The maximum length is approximately 172cm.