expression
bounce and resilience (of hair)
Used in haircare and beauty contexts to describe hair that has both springy volume (ハリ) and firmness/body (コシ). Often appears in product descriptions and salon talk.
このシャンプーは髪にハリとコシを与えます。
This shampoo gives hair bounce and resilience.
加齢とともに髪のハリとコシが失われてきた。
With age, my hair has lost its bounce and body.