Description de chez Amazon USA : - For Upright String Bass - Kolstein & Sons, Ltd. produces this outstanding upright string bass rosin using their Ultra Formulation Supreme recipe. - Very minimal powdering and excellent grip equate to quick response and consistent sustain for both the veteran and beginning bassist. - Kolstein Ultra Formulation Supreme All-Weather Bass Rosin is world famous for its low powdering and smooth, easy bowing. - A good rosin for players with respiratory difficulties.