Women's Alpha Core Sleeveless Base Layer

The Alpha Core SL Base Layer stands out for its exceptional warmth-to-weight ratio and its ability to resist wet weather. It's crafted with Polartec Alpha-Direct insulation, which retains warmth even when wet. This breathable, recycled fabric is strategically placed in three-quarters of the front and back panels to ensure core insulation.

Continental mesh is incorporated in the side panels and the bottom quarter of the front and back, providing added stretch and breathability. To complete the design, elastic-bound neck and arm-holes offer a comfortable and flexible fit.

•Polartec Alpha-Direct insulation is recycled, warm, breathable, quick-dry and able to maintain it’s insulative properties when wet.
•Alpha-Direct is used in three-quarters of the front and back panels for targeted core insulation.
•Continental mesh is recycled, super light, stretchy and wicking.
•This mesh is used in the side panels and bottom quarter of the front and back panels to provide extra stretch and breathability to the base layer.
•Elastic-bound neck and arm-holes are soft and stretchy.

This product is comprised of two fabrics, the primary being Polartec Alpha-Direct insulation in critical areas, completed with our recycled Continental Mesh that is soft, stretchy and super breathable. We intentionally designed this piece as a sleeveless base layer to maximize it’s versatility. The core, your chest and back are comprised of primarily Alpha Direct insulation to provide an incredible amount of warmth where needed while leaving the rest of the garment breathable and lightweight.  

This garment can be used as a stand-alone base layer under any number of jerseys from our lightweight Summer jerseys paired with a lightweight vest of jacket for chilly morning rides, or worn under our Alpine or Storm+ Thermal LS Jerseys for an added boost of warmth. The sleeveless nature allows you to keep your core warm while allowing more ventilation and breathability in your arms. The Alpha Core SL Baselayer can even be worn on top of a SS or LS baselayer such as our Transfer C or Thermoregulator for a boost of warmth for the coldest rides.