Biolage - Volume Boost - Shampoo - 400ml Bring a burst of lightweight volume and lift to limp hair with Volume Boost Shampoo. This plumping formula delivers gentle cleansing and long-lasting volume to fine strands while maintaining fine hair’s natural softness and shine. It’s infused and micro-dosed with a concentrate of micro-filtered soy protein and polymers that’s been carefully calibrated down to the microgram within a formula designed to precisely raise volume levels without sacrificing hydration or softness.