Daylesewblessed

I am getting ready to hand quilt a shadow box quilt and want to try the "big stitch" method. I have crochet thread to use, but I also found a spool of upholstery thread that feels like the right weight to me. I am looking for opinions as to its suitability and opinions about other possibilities of thread for this project.

BTW, I am considering using a wool batt for this quilt.

Thanks!