Saol Irish Cable Knit Jumper $96 Buy on Amazon This pure wool sweater uses honeycomb, cable, and diamond knit patterns. A turtleneck adds extra warmth for harsher winter weather.

Like the aforementioned merino and cashmere, yak wool is a premium product. The Chimera, the company's least expensive sweater, costs $160. Other models go for as much as $240.

The classic V-neck sweater from London label Chinti & Parker is a fine knit in wool and cashmere. It’s a great trans-seasonal choice as it’s light and can be worn layered or straight on the skin.