Where is the first sign of ageing?. . .Your neck !!!
All the Botox / Fillers / Thread Lifts in the world won't fix your neck unfortunately so start looking after this skin now!
Cleanse & apply all products to this area (serums / moisturizers) in upward strokes towards the jaw line & out towards the ears.
Any product left rub into the decollété and the backs of your hands.
Runners or those outside a lot pop your SPF on the back of your neck too all seasons not just summer!