Product watch: How to prevent a bad hair day

The summer sun does wonders for your mood but can play havoc with your precious tresses. Rachel Marie Walsh has some tips to help you prevent (considerably longer) bad-hair days.

Dull Lengths

Dry, dull hair is exposed by summer sunshine. Blake Lively has changed her hairstyle almost as often as her outfits for the ongoing Age of Adeline press tour, yet her locks remain lustrous as ever.