My denim quilt was the first quilt I ever made and it's super warm (also been patched a few times). I used 8" squares that I won on eBay and all the squares were of different colors in sets. For the backing I used a large fleece blanket (no batting), sewed it together "envelope style" and then tied (with crochet cotton) at every square intersection. HEAVY !!! If you opt to NOT make a raggy quilt MAKE SURE you allow a minimum of 1/2" seams as they will unravel during washing if you don't (that's the reason mine has been patched .... lol).