If you have purchased a Philips Coolskin 8060 Shaver then at some point you will need to replace the shaving heads and for that you will need to purchase the HS85 Replacement head for the 8060 Philips coolskin shaver, Unfortunately for me I have a very strong stubble growth and use up my shaving head replacement in about 3 to 4 weeks and that does not take into account the 2 disposable razors I need to use along with this Philips coolskin shaver However, for most people they will probably get 4 months use out of the shaving head before needing to replace the head. My Philips 8060 is the only Electric shaver I have found that will give me a resonable shave considering I have such a strong growth so if you are in the market for an Electric Shaver which will give you a good shave for most people, then try the Philips 8060 Shaving System I think you will be well pleased. Dont forget the excellent shaving head the HS85 replacemnt which is not exactly cheap but will last most people for quite a long time.