Most of the safety features relate to keeping the Poison Ivy killer where you want it to go, and not getting it on you. It can cause irritation if you end up with certain types of killer on your skin and you certainly do not want to get it in your eyes. Most weed killers won’t do you permanent damage, but they are still worth being careful when using. A way of spraying the weed killer accurately is one of the most useful features, as this allows you to avoid getting it on you. Also, some will include gloves and goggles if you want to ensure that it doesn’t get anywhere near you.