I too am confused about Patagonia's sizing these days. About 6', 170lbs and had to exchange a down hoody in large for a medium two years ago. Am inclined to go with medium on this Primo Down especially since I don't plan on wearing a lot of bulk underneath.

Tech Specs:

Material:

[membrane/laminate] Gore-Tex Performance Shell; [shell] recycled nylon (70D), DWR coating; [lining] polyester plain weave 

Insulation:

700-fill goose down 

Fabric Waterproof Rating:

guaranteed waterproof 

Fabric Breathability Rating:

guaranteed breathable 

Hood:

yes, fixed 

Fit:

regular 

Length:

hip 

Venting:

underarm zips 

Powder Skirt:

yes 

Pockets:

(external) 2 front hand, 2 front chest, 1 sleeve zippered, (internal) 1 chest stash, 1 chest zippered (with key clip), 1 internal media 

Seams:

fully taped 

Weight:

2 lb 8 oz 

Recommended Use:

skiing, snowboarding, alpine adventures 

Manufacturer Warranty:

lifetime