I bought 2 collars for 2 dogs. The smell is citronella and very strong and it is oily. It says on the package that it would only keep pests away from the ears, eyes and face. I had hoped it would help with the fleas in these areas since it is difficult to treat those areas but it did not not. In less than a week, the collars were coming apart. I tried to stitch one back together but the fabric just seemed to crumble. Looks like nylon but possibly degraded from the citronella oil.
This collar is amazing! I have a dog that loves to stay outside, even in the hot summer. The flies were eating his ears and they were bleeding all the time. I tried creams but they were messy and didn't last very long. I put this collar on him when he goes out and the flies don't touch him. When he comes in, I just put the collar in a plastic bag and it's ready for his next trip out. I love that there are no chemicals in it.
This is a great product, I have tried a lot of things for flys on my dogs ears and this is the first thing that I have found that really works. Works great. Put it on and don't have to worry about putting on any kind of medicine.