Petzl Replacement Foams for Vertex <2019 helmet Suits:Default The unique locking device is

The unique locking device is opened by depressing the lever with your thumb while griping the biner

External Diameter: 175mm

Using a ring and ring friction saver has more friction than a pulley style friction saver

Cut proof edge

Petzl Replacement Foams for Vertex <2019 helmet Suits:Default The unique locking device isIf your helmet is getting a bit ripe it might be time to give it a freshen up with some new foam headband padding. These Petzl Replacement Foams are available for both the Alveo and previous generation Vertex helmets pre 2019. Comfort foam absorbs perspiration Needs regular maintenance Machine washable Weight: 15 g Material(s): polyethylene