Under Armour Sleeveless Vest - Black - S

600-fill power is a measure of the down's loft or volume. Higher fill power means the down is lighter, more compressible, and provides better insulation for its weight. 600-fill is considered good quality and offers substantial warmth.

The vest uses Allied Feather & Down insulation, which is certified to be ethically sourced. Each garment tag provides a QR code or reference number to trace the origin of the down.

The vest features UA Storm technology, which repels water and is suitable for light rain or snow. For prolonged exposure to heavy precipitation, additional waterproof outer layers are recommended.

While extremely warm for its weight, the sleeveless design means it provides core warmth. For extreme cold, it is best used as a mid-layer under a heavier, insulated, or waterproof jacket.

Store the vest loosely in a dry, breathable place. Avoid compressing it tightly in storage bags for extended periods, as this can damage the loft of the down insulation over time.

The sleeveless design prioritizes upper body mobility, allowing for a full range of motion during athletic activities and making it easier to layer effectively without adding bulk around the arms.

Ensure the down insulation is evenly distributed. Gently shake the vest. Check that no other layers are interfering with the vest's insulation.

Wash the vest according to care instructions. Consider a professional wash or a specialized re-proofer for technical outerwear if performance doesn't improve after washing.

Ensure tumble drying on low heat is used. Avoid ironing, as high heat can damage the fabric and insulation.