The top back has Velcro, allowing it to be attached to a BAREN hat. The hat is not included and is being sold separately. The male side of the Velcro (the rough side) is attached to the wig, and the mesh is fine. I tried attaching it to a regular, commercially available inner cap instead of a BAREN hat, and it worked (→ I was even able to go outside wearing a regular hat over it), but I'm a little worried about it if I were to run. I think the dedicated hat is the safer option. While doing that experiment, fine debris got into the Velcro and wouldn't come out, so I've marked the product condition as "slightly damaged or with stains." It doesn't affect the adhesion. Please refer to the fifth photo. By the way, the regular inner cap that I attached it to got a bit fuzzy (⁠；⁠^⁠_^⁠⁠） There's no damage to the wig's hair, and it has been maintained using wig-specific shampoo, conditioner, oil, and spray. I purchased it for 3500 yen and used it almost every day for about 3-4 months. You can freely cut and adjust the width and length of the wig's hair, but I haven't made any adjustments like that. Because it's a wig, you don't have to worry about hair damage, and it's a great opportunity to try inner color easily. How about it?