There's the common advice to wear long pants & tuck them into socks. But at times I've found the exact opposite: short pants are fine.
Why: ticks can be hard to find on clothing. So you get home, inspect legs etc, and (later) a tick crawls from pants onto your leg & you may not notice.
Bare legs otoh make it trivial to check for ticks regularly during a walk, and/or when you feel something crawling up your leg. Since they're not yet attached then, a flick of your finger & they're off.
Some say "neurotoxin". Others say "neurotoxin till dried".
Frankly, I'll keep it away in any form. I dont want to harm my cats. Even if it means that I'm a human pincushion to mosquitoes and ticks.
They make flea collars for cats with permethrin (I found out just now) so it can’t be that toxic. If you’re really worried just get a pair of hiking pants and boots and keep them in a catproof tote.