#5: Washing in high temperatures makes wool shrink
False. Wool can be washed in hot water. It can even be boiled. The important thing is to make sure the garment is still during the process. Wool will only shrink when it is moving around in the hot water. The combination of heat and movement is what causes the shrinking, so make sure to always select a wool or gentle cycle when machine washing.
#6: Wool garments cannot be spin-dried
False. There is a long-lived myth that you must dry your wool sweaters by folding them in a towel and squeezing out the water. However, SIFO’s study shows this is not true. Contrary to popular belief, wool can be spin-dried. SIFO used three different spin cycles; 400, 900, and 1400 RPM, and neither of them caused shrinkage. Still, wool rarely needs a spin cycle over 800 RPM, so try to keep the spinning to a minimum.
#7: Knits and wool sweaters must be flat-dried
False. Another common myth is that woolen garments must be dried lying down on a flat surface. However, SIFO study concludes that if the garment is dry enough, for example after a short spin cycle, it is okay to hang-dry the garment on a hanger.
#8: Wool can only be washed with wool
False. Wool can be washed together with garments made of cotton or synthetics. According to SIFO’s study, the probability of a barely detectable shrinkage (0.5%) did increase, but in this context, it is barely worth mentioning. The study also concluded that wool garments do not attract more lint or pill when washed with other fabrics. Keep in mind that the wool program is very gentle and ideal only for lightly soiled garments. The washer should never be more than 50% full, but it is okay to include other types of fabrics.