An exciting new option for bassists! Wiedoeft Rosin, among the most popular in the first half of the 20th century, was off the market for 57 years. It has recently been re-introduced, and has been re-formulated for the demands of modern playing and equipment. It assists the interaction of your bass bow hair and strings in producing a warm, velvety, smooth sound. Not waxy - doesn't become slick in warm weather. Comes in a flexible silicone container enclosed in a cardstock sleeve.