Seal gut parkas

For protection against the wet - waterproof seal gut parkas made by the Inuit. Sometimes grass was sewn into the seams - it swelled when it got wet and made the seams waterproof. This one is in the Glenbow Museum, Calgary -

and these (photographed in 1910) both seem to be decorated with feathers -

This is what they start with (read about the process here)