Dozens of jobs will be lost with the closure of a apparel maker after leading New Zealand outerwear label Kathmandu moved part of its production operations to China.

Whangarei-based apparel maker Glenside Clothing said it would close this month with the loss of 28 jobs after Kathmandu opted to purchase wet-weather clothing from overseas as part of its drive to reduce costs.

Kathmandu said it had tried the option of producing all of its clothing in New Zealand but it was too expensive.