Thank you for viewing. You can freely attach a helmet holder to the outside of the backpack. I purchased this a few years ago, but I'm selling it because I've never used it and have kept it in storage. It has only been taken out of the box. There is no box. This is an embroidered version, a limited edition not currently available. ♦︎♦︎Instant purchase welcome♦︎♦︎ I am open to price negotiations to a certain extent. Thank you very much. Brand: MAMMUT Weight: 60g Product Description: You can freely attach a helmet holder to the outside of a Mammut backpack. The flexible material securely stores the helmet, making it easy to transport. Trekking Mountaineering Hiking Outdoor