On SW site I can't see the chicken breast slices, but found the wafer thin chicken:
Wafer Thin Chicken Slices, chilled , per 100g 1 syn on Red and EE, 6 syns on Green
Wafer Thin Chicken, chilled , 70g pack Free on Red and EE, 3½ on Green
Not sure what the difference is, but think you have to syn yours