
BUILT
FOR WHERE
NOTHING ELSE REACHES.
4Cats is FDM F.lli Mazzola's brand for snowcat passenger cabins. For thirty years we have designed, welded and tested — in Bergamo, Italy — snow groomer cabins that carry guests, staff and equipment to alpine refuges: lightweight, certified, and configured one at a time around your vehicle and use case.
Not an accessory.
The only
solution.
We were born in 1996 from a family intuition: build a passenger cabin light enough not to overload the PistenBully, strong enough to survive −30 °C and the vibrations of a tracked vehicle climbing a slope. The first delivery arrived under snowfall at Club Moritzino — sixteen people, under 800 kg.
Thirty years later, with EN 15085 CL1 railway-grade welding certification applied to snowcat work, we build cabins for alpine refuges, high-altitude hotels, ski resorts and mountain rescue teams across Italy, Austria, Germany, Switzerland and France — and on request we ship to Scandinavia and North America. EN AW-5754 aluminium frame, acoustic insulation ≤ 62 dB(A) in operation, stable microclimate between −30 °C and +40 °C: every cabin leaves Bergamo with a technical file traced joint by joint.
Read our design philosophy →The 4Cats
cabin.
Three configurations. One structural architecture. Each cabin engineered for the actual use case.

4Cats Transport
Standard passenger cabin for transport to refuges and high-altitude lifts. Capacity, comfort, acoustic insulation.
View specifications →Four contexts.
One single quality.
Alpine refuges
Snowcat passenger transport from valley floor to refuge: staff, guests and equipment, up to 23 seats, reconfigurable benches.
See snowcat cabin projects →High-altitude hospitality
Passenger cab for mountain hotels and ski resorts: fine dining shuttles, evening events, private hospitality above the peaks.
See snowcat cabin projects →Shelter & overnight
Shelter configuration with controlled microclimate for overnight stays at altitude, mobile bivouacs, research camps in unsheltered terrain.
See snowcat cabin projects →Rescue & broadcasting
Custom snowcat cabin for alpine rescue, medical units, mobile broadcast control, sensitive-equipment logistics above 2,500 m.
See snowcat cabin projects →4Cats cabins already
at work across the Alps.
4Cats cabins work every day at Club Moritzino in Alta Badia, on the Grostè for Boch in Madonna di Campiglio, at Piz Seteur in Val Gardena, at Sunny Valley Resort in Santa Caterina Valfurva, on Montebello above Foppolo.
Every installation starts from the refuge operator's needs and from the vehicle the cabin will be mounted on — PistenBully 300, Kässbohrer, Prinoth — because a cabin that does not talk to the vehicle is a cabin that breaks.
See all snowcat cabin projects →Got a
high-altitude
project?
Tell us the use case, altitude, frequency. Our engineering office responds with a structured proposal within 48 business hours.
