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  1. What Is Thermal Mid Layer Clothing?

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    Thermal mid layer worn by two cross country skiers in the Alps

    Most outdoors people understand what a base layer is and the function it performs in keeping you warm and dry. However, when it comes to a thermal mid layer there is still a lot of confusion about its purpose and what one exactly is.

    PURPOSE OF A THERMAL MID LAYER

    The primary role of a thermal mid layer is to add extra insulation to your layering system without being overly bulky. It is usually worn over your base layers but some garments, like our Factor 2 mid layer range, can also be worn directly next to the skin.

    Its secondary role is to carry on transporting moisture away from your skin via your base layer to the next layer of clothing. If your mid layer has poor wicking properties then you are going to get damp very quickly when working hard. This can lead to rapid heat loss when you slow down or stop.

    TYPES OF THERMAL MID LAYERS

    Personally i think a lot of companies wrongly label garments as thermal mid layers, such as micro fleece jackets and lightweight down jackets. For a start they are far too baggy to be true mid layers and are often poor at managing moisture. A lot of the time it is a clumsy attempt by a brands marketing team to adhere to the layering system – base layer, mid layer, outer layer – when their range is not complete or when their range is too large.

    Our classification of a mid layer is pretty simple. It should be snug fitting, offer good moisture management, and be insulating. Basically it is a thicker version of a base layer. When we were developing our  award winning Factor 2 mid layer range, we took these parameters and designed a bespoke fabric around them. Nearly three decades later our Factor 2 is still one of the best thermal mid layers you can buy.

    WHEN SHOULD A THERMAL MID LAYER BE WORN?

    Deciding if wearing a thermal mid layer is necessary is dependent on the weather conditions, the activity you are intending to perform, and ultimately your own personnel tolerance to the cold. If in doubt, always err on the side of caution, as you can always remove a layer.

    For a relatively sedentary activity such as fishing where little heat is generated from movement, you are going to want to wear as much insulation as you can to ensure you trap and retain body heat.

    On the other hand, if you are a proficient skier, then you are going to have an aerobic workout even in very cold temperatures, so overheating may be a problem wearing a full layering system. In this situation we would recommend wearing a base layer top and bottom with just a mid layer top to protect your core. If you find you are getting too warm then you can always remove a layer relatively easily.

    For extreme cold conditions, such as polar expeditions, then a good base layer and thermal mid layer are a necessity, and a re just the start of your layering system.

  2. New Base Layer Zip Turtle Design By Sub Zero

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    Sub Zero Factor 1 Plus Long Sleeve Zip Turtle Thermal Base Layer Aqua

     

    Sub Zero Factor 1 Plus Long Sleeve Zip Turtle Thermal Base Layer is a new addition to the award winning range.

    New developments in seamless knitting technology have enable Sub Zero to add a lightweight 18cm (7″) long zip to a garment based on the ever popular Factor 1 Plus Long Sleeve top design.  This new base layer top features an innovative seamless body construction that incorporates stretch rib zones for enhanced support and waffle zones for increased thermal efficiency. During the dyeing process, a hydrophilic treatment is pressure injected in to the yarn, increasing the wicking rate of the fabric, allowing much greater control of perspiration. The stand-up double thickness turtle will protect your neck during outer activities – an area of the body that is often left exposed when wearing other base layers. The zip used in the turtle is lightweight to prevent ‘zip ripple’ when done up, and the fabric chin guard will protect your face from zip puller rub. If you do get too hot when wearing the base layer then lowering the zip will give extra aeration (t also helps the wearer to get the garment over the head) . Integrated thumb holes in the cuff of the sleeves protect your hands on cooler days and allows you to wear snug outer jackets without your sleeves riding up.

    These new Sub Zero thermal zip turtle base layers are ideal for outdoor activities in the autumn and winter where extra protection of the neck is required, such as when winter walking, cycling, hiking and climbing. For greater insulation in the depths of winter, why not try this Zip Turtle base layer with the Sub Zero Factor 2 mid layer range. Used in combination, this layering system will keep you snug, dry and ready for your winter adventure.

    The new Factor 1 Plus Zip Turtle range currently comes in two colours, black and aqua blue, and in sizes XSmall -XXLarge.

     

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