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10% of all profits from Shield online sales will be donated to our Winter Outreach Partners + Free Ground Shipping on orders $150+!

Image of 4 people wearing Seirus Base Layer with gradient material background light to dark Text HeatWave Base Layer features category intro

BASE LAYER

Cold weather base layers are essential for warmth and comfort. Our Heatwave Technology amplifies and retains radiating warmth, maximizing your cold-weather comfort. From mountain peaks to city streets, this versatile innovation ensures you begin your journey feeling warm and remain that way all the way through.


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only 1 left in stock


Unit price per 

Color:
Gender:
Size:

only 1 left in stock


Unit price per 

Color:
Gender:
Size:

Unit price per 

Color:
Gender:
Size:

Unit price per 

Color:
Gender:
Size:

Unit price per 

Color:
Gender:
Size:

Unit price per 

Color:
Gender:
Size:

Unit price per 

Color:
Gender:
Size:

only 3 left in stock