It tends to cover the majority of the body and has often been attributed with religious or cultural dress.
But the style is becoming more popular with others as well.
According to fashion lecturer Steven Wright at University of South Wales, modest fashion is expected to grow by around 50% by 2020.
According to Forbes, the modest fashion industry is worth around $44bn around the world.
Retailers like Marks and Spencer have recently started compiling a collection of modest clothes online for women that includes long sleeves, high necklines and flowing fabrics.
Higher end fashion houses such as DKNY, Dolce and Gabbana, Oscar de la Renta have also offered up more modest clothing in their lines.
Sports retailer Nike was the first major brand to launch a hijab for women.
This week modest fashion hit the runways at London Fashion Week and closer to home, students and lecturers in fashion in Wales say it is important that it gets a spotlight.
Modest fashion refers to clothing covering the majority of the body.
Students say it's an industry they'd like to work in in the future.
