Anyone with damaged hair who blow-dries, flat irons or curls regularly and wants heat protection and strengthening in one step. It suits most hair types; very fine hair should use a small amount. It is a retail leave-in for home use.

Heat is one of the main reasons damaged hair keeps getting worse. Play Safe lets you keep heat-styling while taking some of that pressure off: it protects up to 450°F and, unlike a plain thermal spray, adds plant proteins that help strengthen the fibre. Redken's test results (70% less visible split ends and 28% less breakage) make it a practical everyday step for anyone who will not give up their hot tools.

• Apply to clean, damp hair before blow-drying or heat styling.
• Distribute through the lengths and ends for even coverage.
• Leave in; do not rinse. Style as desired.

Pros:

• Rated for heat up to 230°C / 450°F
• Adds strengthening proteins while protecting
• Cream texture gives some smoothing and control while blow-drying
• Redken reports 70% fewer visible split ends

Cons:

• Cream texture can be too rich for very fine or oily hair
• Contains mineral oil and silicone
• Contains wheat protein and fragrance allergens