✅ Quick Answer Humidity lifts the hair cuticle and causes frizz, and grays frizz more because they are drier and more porous. To fight both on the road: cleanse and deposit color in one step with a gray-coverage shampoo, pack lightweight hydrating products, blot with a microfiber towel, and limit heat. One multi-tasking product keeps color and frizz in check without a complicated routine. …