Tahiti Effect Tahiti Effect by Katia is a mercerized cotton ribbon with a satin and very soft touch. Composition: 100% Combed and mercerized cotton. It is woven with 4-5mm point needles. Each skein has 50 gr and 85 m. With 7 skeins you can knit a T42 short sleeve sweater. Washable up to 30 degrees. It can be ironed at low temperature.