I bought a yard of neoprene fabric from Amazon (1/8" thick, black; or buy 2mm thick). I cut a few pieces roughly 8" x 12" and use one on each thigh to hold the guitar. Works really well! Just never let it get wet...! You'll have plenty left over to share with others.
2015 Connor spruce/Indian rosewood
1978 Ramirez 1a cedar