Finisterre Farne Rollneck Knit Jumper (£125) is a modern take on a classic fisherman's jumper from a brand that's certified B Corp (the hardest eco-certification out there that requires the brand to be fully committed to prioritising the environment and society in every aspect of its business). Made from merino wool, this piece checks a lot of boxes: it's versatile, classic (e.g. it will never go out of style), not harmful to the environment, and incredibly warm.