SSTEW3 was founded in 2019 by Leonard Stewart II. Stewart's design ethos is crafting garments through premium construction with the future in mind.  SSTEW3 is a theoretical chemical formula (hence the use of the SS₃ logo) that creates garments that can be recycled or biodegrade after their use has run out.

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Stewart has been pushing the needle for SS₃'s success through practical business efforts which have gained his design work rapport within the networks of luxury retailers and other reputable platforms. Continuously designing collections that reflect what humanity's wardrobe could look like in the future in the present time, SSTEW3 presents a unique voice within the fashion industry.