If you have an old inflatable mattress, consisting of several independent sections, it is easy to adapt as life jacket for boating. You will have to sacrifice one of the middle sections, making it T-shaped hole for threading of the head. To fix the other slightly inflated section around the torso using the waist belt and extra lacing.
Recommend to read
Po-2 (U-2)
Training U-2 aircraft - single-engine biplane of wooden construction with fixed landing gear, was designed at the factory number 1 in Moscow under the leadership of H. H. Polikarpov. His...
VISE WITH GEAR
This device will serve you well — will facilitate the drilling of holes: in the grip gear grip force and a half times more than usual, which increases the reliability of fastening, and...
