Vintage Military Bags

I bought the case of a garage sale and was told he was the First World War. It seems very old and is a sort of beige.
It is a tag inside that says "Sun Brand Sun Tent Sleeping Bag Co Luebbert San Francisco-Los Angeles" It also has snaps on the side that say "Sun Tent-Luebbert SF & LA Cal

They really didn, t do what we call a sleeping bag WW1 era. It is very likely an M-1942 Mountain bag is quite common and based on the color used in WW2.