The Silky, Strong Treatment that stays with You. The world's favorite leave-in conditioner just keeps getting better. Now, it's a 10 Haircare signature leave-in conditioner is available with the power and performance of silk protein. Spray on and comb through wet or dry hair for noticeably amazing shine and smoothness. Tangles slide out effortlessly, while additional conditioners repair and reinforce strands from root to tip. The result is stronger, longer, shinier locks that respond better to styling and environmental challenges like humidity or dryness.