Syoss Professional effects. We believe you deserve beautiful salon hair every day. Syoss, inspired by hairdressing salons, co-created and tested by barbers, creates a structure to strengthen the hair surface. It offers 48 hours of long-lasting hold and a perfect balance between hold and softness. Bring salon and long-lasting style home! Power Hold modeling hair gel: - 48 hours of Mega Strong fixation - 48 hours of maximum styling control and super strong hold for mens hairstyles. - styling and easy styling of hairstyles. - It dries quickly and does not stick to the hair. - easy to wash.