List of mandatory equipment for winter and alpine tours. I am providing a list of items that each client must bring with them on a tour. Things marked * are dependent on the tour.
List of mandatory equipment for winter and alpine tours

Lightweight down jacket

Technical climbing shoes

Technical climbing crampons (available for rent)

Technical or tourist ice axe* (rental possible)

Hardshell set

Helmet (available for rent)

Avalanche beacon, probe and shovel *

Headlamp

Ski goggles

Sunglasses

Climbing backpack with ice axe attachment

Softshell sweatshirt

Thermal underwear

Thick and thin gloves

Cap

Harness (available for rent)

Buff to cover mouth and nose

Thermos with hot sweet tea

Energy or protein bars

Bivouac bag or aluminum foil*

Sleeping bag liner*

First aid kit

Magnesium or salt for cramps

Mountain insurance (James, Alpenverein, Union, …)