CURTAIN AIRBAG INCLUDING EXTERNAL CINCHING LOOP

An assembly includes an airbag having an inflation chamber. The inflation chamber is defined by a first inflatable section, a second inflatable section, and a duct fluidly connecting the first inflatable section and the second inflatable section. a tether is external to the inflation chamber. The tether has a cinching loop encircling the duct. The tether has a tail extending from the cinching loop and the tail is fixed to the airbag.