Hello everyone. I need to buy some yarn and still have some questions regarding the material. Do you all knit with wool or wool/acryl or can this pattern be knitted with cotton or acryl? Or combination? I have enough merino for bacground colour but need to buy contrast colour. I was wondering if this contrast colour could be cotton or not? Would the sweater be too heavy then? What do you think? Blending and framing colours would be also knitted with wool.