Excellent idea. I do something similar with my denim/flannel quilts. I cut 6 inch blocks of each and sew them together with 1/2 inch seams so that the frays are on "top" (the denim side), and the flannel is smoother on the "bottom." You're right, it's a great look, and the denim makes the quilt heavy enough, the flannel makes it warm enough - no batting required :) Some of the flannels (cut from old throw-away work shirts) were a higher quality (or maybe they were a blend?) and didn't fray so well, and had to be picked, but for the most part it's a quick and easy quilt. So far the ones I've made have been from the work clothes of fathers/husbands/brothers who have died. They are wonderful memory quilts for the family. I also did one this way from the blouses and dresses of a friend's mother this way. She rests it over the back of the rocking chair her mother sat in when she embroidered.