Ticks are pulled in by the static charge of your clothes — Fieldstatic prevents the build-up of a static charge.
A 2023 study by the University of Bristol found that ticks can use electrostatic forces to jump from plants onto passing animals or people — they don't even need to crawl. In other words, you've been defending against one way ticks attach to you, but there's another one too.
Repellents work on contact — they deter ticks once they're already on you. Fieldstatic works before that: by neutralizing the static charge that attracts ticks in the first place, it removes the signal that pulls them toward you. Two different problems. Two different layers. Most people only know about one.
A different layer of protection, built on the mechanism everyone else ignores.