Goldwell Dualsenses For Men Thickening Shampoo 300ml This Thickening Shampoo for men from Goldwell's Dualsenses range works to give the hair volume & body whilst providing a deep cleanse & leaving you feeling refreshed. Featuring the innovative Recharge System with Guarana Caffeine Complex, this shampoo strengthens the hair by providing vital proteins that give the hair a fuller, thicker look.