A fluffy silk press is achieved by shampooing and conditioning the hair, then going in with a heat protectant, blow drying and lastly, flat ironing the hair.

The hair thickening spray, which doubles as a heat protectant spray, doubled the volume of a writer’s thin, flat hair and helped hold curls without weighing it down. Skip to content InStyle ...

Post Wanted ranked and reviewed — spritzed and sprayed — the best hair sprays of 2025. Shop Aussie, CHI, L'Oreal Paris and more top brands for your next purchase.

I tested the brand new K18 AstroLift Volumizing Spray on my fine, flat hair for two months—and it's now my go-to daily styler. Here's my full review.