The AAR jacket system was developed to overcome the problems of tapper shortage and high cost of production faced by the group and AAR ringuard, to reduce rain interference especially in young mature areas. Yield per tapper in jacketed fields increased by 15 to 101 per cent. Corresponding increase in yield per ha was however lower. Owing to the higher yield per tapper obtained, tappers wages were raised by 24 to 53 per cent due mainly to lower frequency of tapping and also larger task size in jaceted areas. AAR rainguards were very effective in the experimental scale trials giving protection to more than 90 per cent of panels against rain interference compared with 9 per cent for unguarded control areas. In the commercial rainguard areas, 12 extra tapping days were obtained over a period of 12 months. Cost of rainguarding was fully recoverd only two months after installation based on a breakeven yield of 90 kg per task. Overall the AAR rainguard is a practical, economic, and effective device against rain interference.