RARE Vintage DOUBLE TAKE RIDGEWAY BY KELTY Backpack / duffel bag 38 LITERS 
Excellent condition with limited even wear.
Made of heavy nylon with a coating on the inside to make it waterproof. 
Interior lining is fully intact. (some times they start to deteriorate and flake off)
One of the side holding straps has a little fraying (see pic). Does not affect bags uses.
Has a couple tiny dirt spots on the back ( see pic.).
Color is a teal blue and tan. 
Interior is super clean. 

Has on large main compartment and 3 more on top of that.
Pack empty weighs just 3.13 pounds (3 pounds 13 ounces)
I believe this is from the late 1980's. 
MEASURES APP.
24" long 
13" across 
7" deep
Total of main area plus extra pockets = 2312 cubic inches or 38 liters.

Can be used as a duffel bag or unzip the back and use the back pack straps to transport.
Has a heavy duty plastic internal frame where the yoke can be adjusted up or down for custom fit.