"Supremely adaptable," said one tester who wore this quilted pullover almost constantly through six months of testing. On cold days skinning up Vermont's Mt. Mansfield, the Nano was perfect over a wool baselayer, with the DWR-coated polyester shell cutting the wind and repelling light precip. And on 60°F nights in southern Utah, the thin layer of PrimaLoft One insulation added just enough warmth to keep the chill off.
The clean, minimalist design and sleek cut slides like butter underneath additional insulating layers or shells. The Nano packs down to coffee cup-size and weighs only eight ounces, so you'll never angst over whether to pack it–and you'll find yourself grabbing for it 12 months a year. $150; 8 oz.; men's XS-XXL, women's XS-XL; patagonia.com.