Just finished first underquilt using Littlefield instructions. Three layers of insultex with top and bottom layer of 1.1 ripstop. Hardest part was keeping all 5 layers in place during sewing. Lots of pins (and a few "choice words" as my wife calls it), then still had times when every thing slid around. But got 'er done. Would like to say thanks for all the tips and advice offered on this forum, could not have got it done with out the help. Now to get out this spring and try it out.