Rukka Wiima jacket in black

The Rukka Wiima does a similar job to the Klim Zephyr. The Zephyr is incredibly fine and thin; so much so that you barely know you’re wearing it. But the material it’s made from is windproof so, whatever you wear it beneath, it will reduce the effects of wind chill. Now the Wiima is not a heavy or thick top, but neither is it gossamer thin like the Zephyr. It wears like a very lightweight tracksuit top. But what it does have in common with the Zephyr is that it is windproof. In the case of the Wiima, the outer fabric is lined with a membrane known as Infinium. Infinium is the new name for Windstopper. But the Wiima has another trick up its sleeve. The jacket is infused with Outlast. Outlast is clever stuff. It stores heat, and then releases it when the rider’s body temperature drops; and what this means is that the Wiima is going to be somewhat warmer to wear than the Zephyr. Warmer, but a bit thicker and heavier.