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"Here are the fill weights and total weights according to the customer service rep:
Thank you for contacting Lands' End regarding the amount of Down in the Men's Down Vest.
The amount changes with the size. Here is the insulation weights.
-XSmall = 86 g
-Small = 94 g
-Medium = 104 g
-Large = 114 g
-XLarge = 125 g
-XXLarge = 136 g
Thank you for contacting Lands' End about the Weight and Fill-Power of the Men's Down Vest, #407857A77.
The Fill-Power is 600 and the weight of the Vest is under a lb. There will be very slight variations, of course, but generally speaking, the weight is .804 lb.
If we can be of any additional assistance, please do not hesitate to contact us."