Factor 1 Unisex Short Sleeve Base Layer Tops are the perfect choice for those seeking lightweight, high-performance thermal underwear for active outdoor adventures.

Made from 100% polyamide ribbed fabric with advanced hydrophilic treatment, this base layer is designed to wick moisture away from your skin, keeping you dry and comfortable in all conditions. Its stretchy tubular construction offers a snug, flexible fit that moves with you, while the set-in sleeves ensure comfort around the shoulders and armpits.

With a generous body length, this top stays securely tucked in, preventing exposure around the lower back. Ideal for a wide range of activities—from hiking and skiing to camping—this versatile short sleeve top provides the perfect balance of comfort, warmth, and moisture control.

Whether worn on its own in milder weather or layered with other Sub Zero in colder conditions, the Factor 1 Short Sleeve Base Layer Top is a reliable and durable addition to your outdoor wardrobe.

Please note: These are end of line garments. There may be some slight colour variations where they have been folded, and some may have different versions of our logo, but apart from this these base layers are perfect. We have greatly reduced the price to reflect this.

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