What are bralletes for?

i was looking through aries clearence bras and i saw these thinys called brallets i saw how lightweight it looked and was thinking that it would be comfortable to wear under my pajamas at night time or under my clothes when im not going any where and relaxing but i gooled this question and saw that people are wearing these as clothe. so are they made for real clothing if so i probably shouldint have brought it lol im only 14 my nromal bras arint comfortable to sleep in so is this okay to where as like a nightime bra what are they really made for?