Been looking at these. Come in a pack of 3 with a short sleeve and long sleeve top plus leggings.
http://www.uttings.co.uk/p117172-ridgeline-mens-thermals-bamboo-pack-black-rlcxbamtb/#.VktoYPnhDIU
http://www.uttings.co.uk/p117172-ridgeline-mens-thermals-bamboo-pack-black-rlcxbamtb/#.VktoYPnhDIU