Patagonia MARS Slingshot Jacket Size M Selling to declutter. It's almost in new condition. You can tell by looking at the tags. I've only tried it on. Patagonia's "Slingshot" is a thin softshell jacket belonging to Level 4 of the "MARS (Military Advanced Regulator System)," primarily developed for the US Special Forces. This rare model from the mid-2000s is lightweight, water-repellent, and quick-drying, making it popular in the vintage market for its high functionality and rugged design as a spring outerwear or fall/winter inner layer. [Marked Size: M] Shoulder width: 50.5 cm, Body width: 63 cm Length: 75 cm, Sleeve length: 63 cm