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“lighter than the Flash Vest”

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Read asInsulated jacketslighter vs Western Mountaineering Flash Vest

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Insulated jackets lighter than the Western Mountaineering Flash Vest

Every one lighter on maker-published weight · closest in list price to the Flash Vest first

Compared with Western Mountaineering Flash Vest5.0 oz·$300

Nothing on record is lighter than the Western Mountaineering Flash Vest among insulated jackets. The closest:

Western MountaineeringFlight Vest6.5 oz$3251.5 oz heavier (43 g)$25 more
ZpacksDown Jacket6.8 oz$3751.8 oz heavier (50 g)$75 more
Western MountaineeringQuickFlash Jacket7.9 oz$4652.9 oz heavier (83 g)$165 more

5 left out of this comparison: 5 with no published weight.

All insulated jackets

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Lightweight Insulated Jackets for Backpacking: Weight, Fill Power and Fill WeightGuide

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Insulated Jackets33 on record