Making the descision about what you put next to your skin is your starting point for choosing the best baselayer for you, whether that's a natural fibre like Merino Wool or a synthetic fibre. Mons Royale, IceBreaker and SmartWool manufacture some of the best quality and most popular merino wool baselayer as they are soft and warm and guaranteed to be anti-odour. If you prefer to choose to go down the synthetic route then North Face, Odlo, Arcteryx and Norrona manufacture a great range of styles. At LD Mountain Centre we have merino wool and synthetic base layers in a variety of warmth ratings and thicknesses with zip or crew neck and long or short sleeve and full or 3/4 length bottoms, so there's something for everyone, you can even get yourself a onesy!