hers Full Volume Conditioner in Beauty: NA. hers Full Volume Conditioner in Beauty: NA. While other conditioners sacrifice hydration for volume, this formula balances weightless moisture with strand-strengthening, volume-boosting ingredients that let hair do its thing. In fact, BIOVOLUME 128™ has been shown to boost hair volume by up to 4X in just 5 washes.. Suitable for all hair types. Vegan and cruelty-free. Formulated without parabens and sulfates. 6.4 oz/ 190mL. Start with Hers Full Volume Shampoo (sold separately). After shampooing, apply conditioner to wet hair. Massage to evenly distribute, leave in for 1 minute, then rinse. HERR-WU25. FNP-VOLUMECNDTR-6Z-01. hers was founded to fight stigmas around health and wellness issues and to break down barriers for women looking for an easier, more affordable alternative to traditional healthcare. Created with a medical advisory board of women doctors, hers is beauty and skincare that feels like self-care. That's why they offer premium, affordable products for women of all ages, without leaving home - hers has you covered.