Mammut Crampon Pocket
Here's what other sites are saying:
The Crampon Pocket from Mammut can be attached to the outside of any of their alpine backpacks to make sure the crampons do not damage other equipment.
The Mammut Crampon Pocket can easily be attached to the outside of a pack to ensure that your spikes don't start eating the rest of your gear. Made from ballistic nylon, this holster will hold up to sharp edges and rough terrain.
- Mountain Gear