Here's what other sites are saying:
Sometimes, just a little extra insulation around your core is all you need to stay nice and toasty. For those times, we’ve created this vest. It packs down so small you won’t even know you’re carrying it.
The ultralight Vajra Vest from Sherpa Adventure Gear provides a bit of extra insulation for your core when you're cruising in the mountains or trekking in the valleys. The 60-gram Primaloft One insulation is covered with a ripstop polyester shell that has been treated with a DWR coating so you stay warm even if the vest gets a little bit wet. Stuff the Vajra into a corner of your pack, and then pull it out when the wind picks up or you feel a chill in the air.
The North Face Pseudio Vest
$69 - $99
Mountain Hardwear Potrero Insulated Vest
$78 - $130
Smartwool PhD SmartLoft Divide Vest
$106 - $110
The North Face Red Blaze Vest
Columbia Vail Square Vest
Craghoppers Kilnsey Vest
$52 - $59
Columbia Aurora's Glow Hybrid Vest
Icebreaker MerinoLOFT Chelsea Vest