Zephyr Surgical Implants (ZSI) is a Swiss-based medical device manufacturer that produces and distributes artificial urinary sphincters and penile implants worldwide.

ZSI products are used in the management of moderate-to-severe urinary incontinence in men, erectile dysfunction, Peyronie's disease, penis enlargement, and female-to-male gender reassignment surgery.

[2] The inflatable penile implant designed for female-to-male gender reassignment surgeries became available in the European market in March 2016, and the first phalloplasty procedures using ZSI 475 FtM implants were performed in June 2016.

[4] Many clinical studies have been performed with the artificial urinary sphincter ZSI 375 in the treatment of moderate and severe stress incontinence, most of them are retrospective and non-randomized tests.

Success rates in total or social continence vary, in a period of 6 to 24 months, between 68 and 89%.