TNT is absolutely safe for human use. TNT is completely safe for the environment, wildlife, and aquatic life.

We recommend applying it to your boots or shoes, socks and lower pant legs as these are likely the first places ticks access. If you will be in a wooded area where ticks are on brush or trees, you can apply it to your upper body apparel as well. TNT it is safe enough to be used in your hair, where it may be difficult to notice ticks. It will wash out easily.