(original post was just for Natureshop.com).
Natureshop.com, Bivouac.co.nz and Outsidesports.co.nz all have a BOGOF running until 20 Feb.
*Free shipping varies across the 3 sites.
Natureshop.con are having 2 for 1 on a big range of current season of icebreaker gear, mens, womens & kids. They've also got 15% off listed on the site, but prices for single items are still high… as always with Icebreaker. When you do 2 for 1, prices are the cheapest I've seen (except for clearance deals, where sizes/styles are limited). Only catch is you have to pay upfront, then they credit back the difference within 24 hours. The 2 for 1 doesn't need to be the same item (they will credit back the cheaper of 2 if you buy different items).
They have free shipping to Australia, and free returns (except no returns on underwear).
I've bought stuff from them before and they're great to deal with. I returned something and they gave a credit on the spot, before I'd even posted the item.
I just checked www.outsidesports.co.nz appear to be the cheapest. Note they do free shipping for over $200NZD purchase. http://www.outsidesports.co.nz/Sale/Icebreaker.htm
I haven't had a chance to check bivouac's offering yet, but probably equal to Natureshop - though they give you the value off the price you pay - no waiting for credit back. For bivouac enter coupon code BOGOF at checkout.
http://www.bivouac.co.nz/icebreaker-buy-one-get-one-free-off…
Snowgum in Melbourne (and maybe elsewhere?) is also having a big Icebreaker sale: http://go.pressconnect.com.au/em/message/email/view.php?id=8…
I have so much Icebreaker stuff now, I only buy it when I am in Auckland, where they have a outlet store: http://www.zenbu.co.nz/entry/1150702-icebreaker-outlet-alban…
The 2 for 1 deal makes it pretty close to the NZ outlet prices.