PETZL Comfort foam for VERTEX and STRATO helmets

Allows foam replacement on VERTEX and STRATO helmets, to extend their life
Installs on headband
Compatible with VERTEX (1) and STRATO helmets
Available in two versions:
- standard closed-cell comfort foam does not absorb moisture or perspiration and is easy to care for
- absorbent open-cell comfort foam absorbs perspiration and is machine washable

(1) Versions starting in 2019