The SB15 V2 has been upgraded with the following features over our original SB15:. . 1. More padding to protect your speaker better. . 2. A layer of plastic has been added in addition to the thicker foam which makes the bag soft yet semi-rigid.. . 3. A pocket has been added on the side of the bag to hold your speaker stand.. . 4. The zippers have been upgraded to YKK zippers along with a track that is more water-resistant. The zipper track looks super neat when you close it. It is also very satisfying because as you zip the pocket shut there is a material that covers most of the zipper track.. . The Rockville SB15 v2 Rolling Speaker bag was designed to fit most popular 15" speaker cabinets. Our speaker bags feature soft foam all around with extra protection on the bottom and top. The bag is soft yet rigid and it will maintain its shape even when empty. We know how important your speakers are so we made sure these speaker bags were built to withstand the rigors of frequent transport. They are water-resistant, rugged and feature dual zippers which allow you to load and unload your speaker with ease.. . This model has side pockets that allow you to secure your speaker stand so you have one less thing to worry about when unloading at your next gig. We also have a large accessory pocket in this bag so you have a designated place for your cables or microphone.. . Inside the bag, there is a tightening strap to secure your speaker from moving around within the bag. We also include a removable pillow that provides extra protection at the bottom of the bag.