Aloha shirt interior, resulting in the muted color on the exterior, and are called "reverse print". Those not familiar with this practice might consider it to be a manufacturing defect because the shirt appears to be sewn together inside-out. The related concept of "Aloha Attire" stems from the Aloha shirt. Semi-formal functions such as weddings, birthday parties, and dinners are often designated as "Aloha Attire", meaning that men wear Aloha shirts and women wear muumuu or other tropical prints. Because Hawaii tends to be more casual, it is rarely appropriate to attend such functions in full evening wear like on the mainland;
Aloha shirt instead, Aloha Attire is seen as the happy medium between excessive formality and casual wear (i.e., business casual). "Aloha Friday", a now-common tradition of celebrating the end of the workweek by wearing more casual attire on Fridays, initially grew out of an effort to promote Aloha shirts. Although it is not uncommon to see professional women participating in Aloha Friday, it is more common to see men dressing this way. According to "The Honolulu Advertiser"'s advertisement of June 28, 1935, the Aloha Shirt was first sold at "Musashi-ya shoten" in Honolulu, was preceded as "Musashi-ya", established by Japanese immigrant Chōtarō