This is a dedicated lens case for the Tamron interchangeable lens "SP 150-600mm F/5-6.3 Di VC USD (Model A011)". The product model number is LA011. A detachable shoulder strap is included. There are two pockets on both sides of the case that can hold smartphones, etc. It uses a double zipper system, and can be opened and closed simply by sliding the strap that connects the two zippers. I didn't use it because I was using a different camera bag.