This cloth bell cover is made from a high-quality double brushed cotton cloth weave that will not scratch your instrument's surfaces. Ties easily with a nylon drawstring. This cover will not impact intonation and have minimal-to-no resistance while playing. The non-stretchy material ensures even coverage surrounding the bell and can secure tightly around bell sizes up to 6 1/2". Fits most clarinets, alto saxes, and trumpets. Designed for safe playing in these days of heightened awareness of spreading disease and infection. Hand washable. Also available in sizes medium, large, and extra large.