The Fast Belt is compatible with the following Gossamer Gear packs:
Skala 38
Kumo 36
Fast Kumo
Grit 28
Loris 25
Cima 15
Vagabond Jet
Minimalist 19

**The Fast Belt is also compatible with the Mariposa and Gorilla packs. While you can swap the PVT Belt for the Fast Belt, it is not recommended. Adding the Fast Belt could negatively affect the weight transfer performance.