Patagonia Men's Micro Puff Vest (Spring 07):
If there's a drawback to being the first on spring trails and the last out of the fall backcountry, it's packing the extra insulating layers required for warmth throughout the frosty night. Patagonia's highly compressible and lightweight Micro Puff Vest gives you the warmth you need beyond your backpacking bivy and sleeping bags. It's windproof, water-resistant and filled with synthetic hollow filament Polarguard® Delta insulation, the kind of stuff that keeps insulating even when wet. The amazing warmth-to-weight ratio sacrifices handwarmer pockets, but inside you'll find a mesh pocket that also doubles as a stuff sack with a climbing carabiner loop. Stop shivering in your campsite--Patagonia's Micro Puff Vest is practical and lightweight warmth you can't afford to leave at home.
