My brother was able to use his trousers for personal flotation! This is a technique that my Daddy learned in the United States Marine Corps and he wanted to share it with us today.
The process takes some practice. First, take your trousers off and tie the legs together with an overhand knot near the cuffs. Put the legs around your neck with the knot behind your head. The waist of the trousers will be out in front of you with the zipper facing down. Facing the zipper down keeps air from escaping out of the seams. Open the waistline and hit the water extremely hard to force air into the waist of the pants and legs. If done right you have made a personal flotation device with your pants!
Over the years sailors, fisherman, military forces and others have used this technique to save their lives.