Suited to anyone dealing with frizz or flyaways who wants a lightweight spray-format product rather than a cream or serum, and who regularly blow-dries or heat-styles their hair and wants a protectant step built in. Because it's described as suitable for all hair types, it isn't restricted to a specific texture, but people who prefer sulfate- and silicone-free formulas specifically will find that relevant here, since Redken states the formula is free of parabens, sulfates and silicones.

Spray Smooth's real differentiator is the combination of a genuinely silicone-free, paraben- and sulfate-free formula with a stated heat-protection spec — many frizz sprays either skip silicones and lose smoothing performance, or rely on them and can build up over time, and Redken is explicit that this one is formulated without them while still stating a specific heat-protection ceiling.

• Shake the can and hold it about 10 inches from hair.
• Apply to damp hair in sections, ensuring even coverage.
• Blow-dry as usual; Redken's own directions describe this as a pre-blow-dry step for maximum smoothness.

• Pro: Genuinely formulated silicone-free per Redken's own claim, relevant for anyone specifically trying to avoid silicone buildup in their routine.
• Pro: Stated heat-protection threshold (450°F/230°C) covers the typical operating range of most blow dryers, flat irons and curling irons.
• Con: As an aerosol, it's less travel-friendly than a pump spray and can't be packed in carry-on liquids the same way.
• Con: Redken's own instructions describe it for use before blow-drying specifically; it isn't marketed with distinct directions for flat-ironing or curling, so results with those tools aren't explicitly covered by the brand's own how-to-use guidance.