24. Some types of clothes bought from non-Jews, or bought from Jews but made in a non-Jewish factory, commonly contain shaatnez and may not be worn until they are checked by an expert. Some types do not commonly have shaatnez but do have a rate of occurrence significant enough to obligate them to be checked. Some types only have shaatnez very rarely and do not need to be checked, as will be explained.
25. Lack of information. The general public does not have updated information about the rate of occurrence of shaatnez in various types of garments. Also, the reality constantly changes due to new techniques in the manufacture of clothes and depending on the price of wool and linen. Thus, one must always consult with a shaatnez lab or shaatnez expert. otherwise, he may easily transgress this grave issur without even knowing it, chas vesholom.
