I use this with my BD Serac crampons. If you purchase crampons, you will need something to carry/store them in. I thought about being cheap and wrapping them in rags but I'm glad I din't do that. When they are wet, they need to ventilate and dry out. This did the job. You cannot see it in the picture but there is a daisy chain on the bottom which can be used to connect this product to the outside of your pack when the crampons are wet/full of snow. This needs to be added to the product description as it influenced my purchase decision.