Does sky diving harm my breast silicone?

Your implants are designed to withstand a significant amount of force. However no breast implant is fool proof. If you sustain a significant enough impact to damage your implants, you should worry far more about other serious injuries such as broken bones, head injury, or accidental death. I think your implants are likely to be fine. Best of luck, and be careful. 

Thanks for your question.  At 6 years out, I do not think that sky diving itself will hurt your implants.  They are very strong devices but do have a limited life span.  If something has changed, best to check with your surgeon.