The Patagonia Nano Puff Jacket is a great inclusion in to any bike packers kit. I use this jacket combined with a half sleeping bag system from Terrarosa Gear for a comfortable nights sleep down to 0deg C. Being made with hydrophobic material and the prima loft insulation means it can get wet in the early morning and still provide warmth. It also doubles as a comfortable riding jacket on cold mornings working well to keep out cold wind. The jacket packs down in to a pocket and compacts down well. I highly recommend the Patagonia Nano Puff - now having two of them to be included on every bike packers packing list.