German World War II camouflage patterns formed a family of disruptively patterned military camouflage designs for clothing, used and in the main designed during the Second World War. The first pattern, Splittertarnmuster, was designed in 1931 and was initially intended for Zeltbahn shelter halves. The clothing patterns developed from it combined a pattern of interlocking irregular green, brown, and buff polygons with vertical "rain" streaks. Later patterns, all said to have been designed for the Waffen-SS by Johann Georg Otto Schick, evolved into more leaf-like forms with rounded dots or irregular shapes. Camouflage smocks were designed to be reversible, providing camouflage for two seasons, whether summer and autumn, or summer and winter (snow). Distribution was limited to the Waffen-SS, ostensibly because of a patent, though variants were used by other units, including the Luftwaffe. Production was limited by shortage of materials, especially of high quality waterproof cotton duck.