Ammy Thach, 26, the founder and designer of Rev Label, a chic streetwear and swimsuit clothing brand, found her passion at a young age. As a pre-teen, her love for fashion was rooted in many factors.

Her swimsuits cost $450 to $1,200 while cover-ups range from $800 to $2,500. Ms. Sabag says she sees more than 200 brides in a year, and about half of them buy swimsuits.

Its swimsuits can cost up to $800 and are made with peau douce, a soft, clingy proprietary fabric that incorporates polyamide and spandex. (The fabric, according to the brand, is a reason for the ...