The Bob Martin Velvet Flea Collar for Cats has been designed with a comfortable velvet feel and felt lining to keep this choice of flea treatment painless for your pet. An insecticide has been contained in the collar that is effective for up to 4 months so you can be assured that your cat is not only flea-free but that you have none of the all too common flea aggravating repercussions. Use on cats over 12 weeks. No one will even know that the collar is working! Do not allow to come into contact with pregnant or nursing queens. Assorted colours please allow us to choose.