Picked these up at a local thrift store yesterday. Absolutely nothing on the innerwebs (that I could find), and no tags inside claiming materials or place of manufacture.
They are made from a slick, not particularly heavy synthetic material that seems like it might be very good in regards to water resistance. Each zippered opening has 2 zipper pull tabs and the attachments for the rack are metal springs and tabs. Maybe 1980's???
Any info about these would be helpful and interesting. Thanks in advance!