Arc'Teryx Thorium SV Women's Vest Button Lock Thermolite® is a hollow core

Thermolite® is a hollow core fiber that provides extraordinary warmth for its weight and remains extremely breathable

it can be powered by the frost-resistant CR123A lithium batteries or large-capacity 18650 rechargeable Li-ion batteries

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Arc'Teryx Thorium SV Women's Vest Button Lock Thermolite® is a hollow coreVersatile, warm, 750 fill power goose down vest with box wall construction and a durable Arato 40 nylon face fabric. Can be worn as a cold weather standalone, or as a midlayer in more severe conditions. Down Series: Down insulated garments SV: Severe Weather. DESCRIPTION Versatile and very warm, the Thorium SV vest combines the exceptional insulation of a box walled down jacket with the freedom of a vest. Lofty 750 fill European grey goose down