Prana - Woolybird 1/2 Zip Standard Fit. Color Stormy Night Heather. Low Stock. On sale for $105.36. MSRP $155.00.. Add to favorites. 0 people have favorited thisLow StockBrand NamePranaProduct NameWoolybird 1/2 Zip Standard FitGenderMen'sColorStormy Night HeatherPrice$105.36MSRP: $155.00