“The essence of the crime consisted, not in wearing a woolen and a linen robe, but in the two stuffs being woven together, according to a favorite superstition of ancient idolaters”
http://bible.crosswalk.com/Commentaries/JamiesonFaussetBrown/jfb.cgi?book=de&chapter=22#De22_11
Yes, Christians should not follow the superstitions of idolaters - though they are different today then they were for the Israelites.