A lightweight bag in water repellent fabric. 2 zips that open the end only, or open the bag along its entire length. I ranks no problem with my tripod manfrotto 190CXPRO3 its Q2 MH54M0-mounted ball. The bag is just the right size. The patella is well protected from dust and shock by cushioning the end of the bag. And more, it's beautiful!
To ensure correspondence bag and tripod / head we can find a table in pdf format by typing in google the words "find perfect tripod bag". This table makes sure to take the proper size bag depending on the hardware.