The cream-colored fabric is from an old vintage bedsheet, the burgundy is a satin ribbon, the white is storebought lace, the dark gray is velveteen. You can see metallic gold from some braid trim I crocheted in. Everything else is a mix of cotton, rayon, poly blend-type fabrics that I had on hand for sewing. The strap has crocheted-along string for reinforcement. Below is the front view with flap open, and the back view.
All were lightweight fabrics (except the velveteen) but some still crocheted up stiffer than others. My favorite fabric to crochet is old silk, but I haven't tried a bouncy/stretchy type fabric such as t-shirt strips or lycra-content sport fabrics. I tried crocheting polar fleece and it's not my thing, but maybe it would be if we got a severe winter.
By the way, this bag shows no age. Fabric strip crochet so durable!