I have found a way to enjoy the comfort of old sweatshirts that I didn’t wear any more, by successfully sewing them into a cozy throw.
I just cut out the shirtfronts and backs and sewed them together in a quilt-like grid. No sashing, batting, or backing needed. To finish the edge, I sewed on a strip of bias-cut flannel. In a few hours, I had the perfect blanket for watching TV or reading by the fire.
Complete directions, should you wish to make one yourself, are posted on Craftsy.com in Projects at http://www.craftsy.com/project/sewing?sortBy=relevance&name=sweatshirt+blanket+throw.