Bioshev Professional Hair Botox Leave In Conditioner with Keratin No. 4 300ml. Leave In Conditioner, from the company Bioshev. Enriched with keratin and sunscreen filters, it hydrates the hair, giving it shine, volume and elasticity, while protecting it from solar radiation. INSTRUCTIONS FOR USE: Apply a small amount to washed and towel-dried hair. The product does not rinse.