Hidersine 6B Deluxe Bass Rosin - Hidersine 6B deluxe Double Bass rosin is a premium, all-weather Dark formulation, based upon the foundation of other ?6 series? rosins. However, as is necessary for Double Bass, this formulation is a somewhat softer blend designed for everyday use in all environments The choice of many bass players, Hidersine 6B deluxe finds the perfect sweet-spot. It is hard enough to deliver good levels of grip / release (Grip Profile #5), yet soft enough to ensure an effortlessly enjoyable playing experience on the requisite larger diameter strings.