User Review: Patagonia Men's Nano Puff Pullover
Price Paid: n/a
All that exposed, fancy patchwork-look stitching will eventually cause problems. About the tenth time I used it, stuffing it into the pocket, some of the stitching must have caught on the zip, as it pulled and wouldn't loosen. I had to cut the stitches to undo the tangled mess.
Either take it easy when stuffing or buy a similar top where the insulation is stitched inside, with a smooth face fabric etc.
What a strange comment. Try an internet search for "Patagonia Nano Puff...stitching coming undone..." There are similar reports on backpackinglight and especially the page on the women's NP hoody at backcountry.