Probably little, because the ticks also sit further up in the bush and drop on the victim.
Fortunately, I am not the favorite target of ticks. But there are people (I know it mainly from women) who almost always have a tick when they come home from hiking.
An acquaintance with whom I was once on a biological excursion (we were looking for butterfly eggs) , knows about her problem. Her method (besides vaccinating, which unfortunately does not help against Lyme disease - and a spray) is to close all access points to clothing. She wears the socks over the pants and has also sealed the sleeves and neck… also she wore a silk balaclava. She really looked very weird and able to scare people. It was a warm summer day and I was in shorts.
When we came out of the bush, we checked each other for ticks. ( This is very important, especially with children) - I had none. She had 3 on her clothes.
In the evening she called me and told me that she found another one while showering.
Since a friend is seriously ill with Lyme disease, I think everything is good that helps just a little against ticks. But this product alone will not help!