The same cotton duck material is still used for old school Caradice cycle touring bags. It's a nice waterproof alternative to oil based materials as the cotton

The same cotton duck material is still used for old school Caradice cycle touring bags. It's a nice waterproof alternative to oil based materials as the cotton swells when wet to seal its own seams. https://carradice.co.uk/ https://carradice.co.uk/