Mine were my sunglasses. They are absolutely wonderful and I wear them everyday. They are prescription lenses that give me perfect vision and actually brighten up and sharpen my vision when it goes cloudy! They are rain resistant so any water spray just dissipates and they also work as protective goggles for strong winds and adverse weather conditions.
As I am diabetic I have a degenerating retinal problem, so they also help protect my long term vision by protecting my eyes in general.
They cost a fortune but I would have paid twice as much had I needed to. A Perfect Purchase that I use every day and worth every penny
What was your best personal purchase of 2016?