Arcteryx Men's Thorium SV vest combines the exceptional warmth of a box walled down jacket with the freedom of a vest. This gives it a versatility to perform as an outer layer in dry, moderately cold weather, or as a lofty midlayer for more severe cold.
Coreloft™ 100 (100 g/m² ) insulation. Made with highly crimped multi-denier siliconized polyester yarn, this lightweight, breathable, and thermally efficient, 100% polyester staple fiber is very compressible and has excellent loft retention.
Arato™ 40 - 100% nylon
750 fill European grey goose down (150 g-M)