The company, which owns Coronet Peak, The Remarkables and Mt Hutt ski areas, donated three palletloads of uniforms, including jackets, ski pants and mid-layers, to help those in need stay warm this winter.
Toll New Zealand carried the goods for free.
NZSki chief executive Paul Anderson said it was a staff initiative which had been around for a few years, and one of the ways the company gave back to New Zealanders.
"Every couple of years we replace the warm outerwear our staff wear and end up with a surplus of clothing that still has some life left in it.
"Sending the old uniform to Auckland City Mission will hopefully help those facing tough times to keep warm this winter."