Recycled some stuff from an old tent and used Joann ripstop with DIY silicone seal. It is roughly 10x12. Used goofy colored grosgrain loops for identification. These are pics of it after testing waterproofness...It worked BTW. Will be used mainly for canoe camping this winter...we actually swim here till december
just wanted to show off what a person can do with minimal sewing experience and a lot of research.

Prince of River rats...out