D.23 long johns.
Long leg thermal pants made from 100% Pure wool and made in New Zealand:

Features

• Made of 100% Pure New Wool.
• With Fly
• Wool offers superior warmth and comfort.
• Natural moisture wicking fabric draws moisture away from the skin.
• Wool fibres trap a layer of air next to the skin to keep you warm.
• 100% wool does not trap body odour like synthetics, so you won't be throwing these away after a few months of use.
• Machine washable.
• Made in New Zealand
  
  Colour: Oatmeal
  Size: S, M, L, XL, 2XL, 3XL, 4XL