I had so many of these backpacks in the 1990s
Thick cotton material with drawstring at the top
Big straps on the back that don’t seem to be adjustable but maybe you can loosen the knots and make them a different length
Cylinder shape
Great cream off white color with big black peace sign logo on front

Some very faint staining on front and back of pack
Check photos for stain flaw

Backpack measures
15 in wide
19 in long

This item is sold from a vintage boutique in Portland Oregon.