I sewed mine with a Singer 99 and nylon upholstery thread. That worked fine. I removed the cloth thread and resewed the bottom of the sack.
I sewed mine with the printed side out, and then turned the sack inside out so the white side was showing. For the top, I sewed nylon webbing with a standard buckle so it closes just like a dry sack. In essence, that's all I really made out of it, just a simple top loading pack.
"You want to go where?"