Winter walking – or walking at higher altitudes in summer – demands a hard working baselayer to keep you warm and sweat-free. Here we reveal three of the best walking baselayers for this winter.

Mammut Polartec Power Wool baselayer

Mammut has created a new baselayer that is perfect for winter walking. The long-sleeved Mammut Trovat (for men) and Kira (for women) Pro Half Zip offers a high level of comfort, great warmth and breathability yet it is also lightweight. In addition it has a UPF 20+ rating. So how does the baselayer manage to be warm yet also lightweight? Mammut has combined the natural properties of Merino wool with synthetic fibres to produce “Polartec Power Wool”. Polartec Power Wool technology weaves together both fibres, natural and synthetic, to offer two different layers:

• An inner layer made of scratch-free Merino wool that is great at wicking away sweat vapour.
• An outer layer made of hydrophobic polyester fibre, which is quick drying, durable and helps to maintain shape.

The top is also super comfortable because of a four-way stretch. Mammut Trovat Pro Half Zip (£80) or check out Snow+Rock for £79.99. Mammut Kira Pro Half Zip  (£100).

Sub Zero Merino thermal baselayer

A new Sub Zero Merino range includes men’s and women’s long-sleeved thermal baselayers. Properties include super-soft wool with a seamless design for great comfort against the skin. Natural merino wool is renowned for its anti-bacterial and odour resistance but did you know it is also “hydroscopic”, which means it absorbs sweat and transports it away from the body while at the same time repelling moisture from the outside? The men’s Sub Zero Merino wool baselayer has a contoured drop back and the women’s has a ribbed bust support, while both are long in the body to prevent rucking and feature a low-profile neck. £59.99 from Sub Zero.

Jottnar Uller baselayer

The long-sleeved baselayer offers high performance thanks to a yak wool blended fibre. Yak wool provides amazing warmth, as well as good levels of breathability and moisture transfer. It also has the same advantages as Merino wool in terms of resisting odour. In addition, yak wool is great at holding the shape of a garment and offers superb durability. Flat-lock seams, a stand-up soft collar and a quarter-venting chest zip provide further comfort. The fit of the Jottnar Uller baselayer is athletic with a long drop back for extra warmth. This baselayer comes in men’s fit only. £90 from Jottnar.