The best one I have found for hiking was a $10 or 11 one from Walmart, and of course they promptly quit sewing them. Never thought about sewing one though!
I may have to make a pattern of it. I wear it when we go 4 wheeling, and don't have the "bouncy owies" the next morning.
Freezer Bag Cooking, Trail Cooking, Recipes, Gear and Beyond:www.trailcooking.com