Feature●Bell cover helps slow the spread of aerosols when performing●Bell Cover Ideal for the bell size around 5 inch, fits for Trumpet, Alto saxophone, Bass Clarinet, Cornet.●Bell Cover made of elastic（85%polyester,15%spandex） and washable fabric and can be easy on and easy off without pull tabs.●Bell Cover has no measurable effect on the sound of the instruments.●The instrument bell covers are double layered, there is a mesh pocket in the back of the bell cover. Removable filters can be inserted for better protection.Description KYT Music bell covers are designed to meet and exceed the recommendations set forth by the Performing Arts Aerosol Study. The bell covers are available in different sizes. Durable stretch fabric with elastic stretches around the bell. Easy on and easy off of instrument bells with no pull tabs. Breathable Fabric, No measurable effect on the sound. With mesh pocket in the back of the bell cover,removable filters can be inserted for better protection.