FF Helios XT down pants, Large Black, waterproof/breathable Pertex® Sheild®
full side zips with twoway zipper. 4.4 oz 850 goose down in a medium so slightly more in large, 16 oz on my scale. New Unused.

retails for $239 with extra for shipping

$175 free shipping conus

Feathered Friends writes:
For a limited run, we've built our ever popular Helios Pants featuring waterproof/breathable Pertex® Sheild® fabric. These are the perfect compliment for cold alpine ascents and ski tours where warmth, durability, and weather protection are paramount.

Pertex® Shield® XT
Specifications:
30 denier by 30 denier, 143 x 132 thread count with a 50 denier rip-stop weave
1.66 oz/sq.yd total weight
Waterproof/Breathable Pertex® Shield® technology

XT fabric available throughout our expedition garment line relies on Pertex® Shield® technology to achieve a superior degree of water resistance and moisture vapor transport. Highly durable, the larger yarns used in this fabric also allow for a greater degree of vapor transfer due to the larger spaces at the intersections in the weave. We employ this fabric for garments that face rugged use in challenging conditions.