I have a Black Diamond Alias 35 ski pack. For some reason they did not have a helmet sling, which seems like a major oversight in a ski pack. I didn't use the pack for 2 years after I bought it because I had nowhere to put my helmet. This sling works great. There are 4 attachment points on the top of the pack. They were too close together to use the sling as is. But I used one pair of attachment points with the sling hooks and then used the haul strap at the top of the pack to hook the other 2 sling hooks and it is exactly what I needed to hold my helmet securely.
This review was written in the old system and had content requirements that are different than reviews written today.