Autumn mornings. The air is cool against your cheeks, and as you cruise around town, your body starts heating up. The perfect situation for HEATTECH. Able to do more than generate warmth, it dries as soon as you start sweating, staving off those sudden chills. Deodorizing properties keep smells at bay, while argan oil in the fabric ensures soft skin even when the air is parched. The turtleneck keeps your neck nice and warm and makes a fine accent to an outfit.

Merino wool is the model base layer for outdoor activity. Superb at insulating, holding heat, wicking moisture, and controlling odors, it has been called “natural air conditioning” for its ability to regulate hot and cold temperatures. Extra-fine merino wool, a UNIQLO standard, is often associated with casual or business attire, but since we use 100% superfine merino measuring 19.5 microns, it’s perfect for light mountaineering and hiking. The smoothness makes for a pleasant touch against the skin

Sometimes you want to chill out in a cozy room, listening to your favourite jazz records. On those long autumn nights, a base layer helps you put your body and mind at ease and relax. The long-staple fibers of this T-shirt, made from premium American-grown Supima Cotton, minimize pilling and create a smooth texture. The tubular knit means no more pesky seams below the armpit. With a premium sheen, you’ll look as good as you feel.

In extreme situations like outdoor sporting events or birdwatching, where you can find yourself chilled to the core, your best bet is HEATTECH Ultra Warm, over 2.25 times as warm as regular HEATTECH. It’s so warm one layer under a down jacket is more than plenty, and eliminating the need for layering helps you keep a trim silhouette. Even if you get hot and start to sweat, dampness is a non-issue, since the moisture-wicking fabric keeps you nice and dry.

Base layers are especially important for kids, since their heat-regulating mechanisms are still developing. Kids can warm up quick running around in the cold air, only to suddenly cool down when they stop moving. Holding in heat while absorbing perspiration, HEATTECH is a great way to cover all your bases. Same goes for our Warm Cotton Stretch, new this season. While generating warmth, the natural material has a gentle touch and texture. Either can be stretched in all directions, ready to stand up to active use.

Kids have a strong metabolism and high body temperature, making it easy to sweat a lot when sleeping in the winter, so base layers that don’t easily dry can lead to sudden chills. Fear not—quick-drying and highly breathable AIRism is to the rescue. Worn under pajamas, it eliminates the stickiness of sweat and promotes a pleasant rest. Since AIRism for kids is blended with cotton, the fabric is especially soft and stretchy, never tight, encouraging a good night’s sleep.