Would you consider a wearable sleeping bag an "essential standby". Our author from the Wirecutter does.
They are different than a snuggie or a slanket. A snuggie is a "wearable blanket" and a slanket is a blanket with sleeves. Snuggies and slankets are shown in pictures as fleecy, slouchy looking things. Something your dog would drag onto the floor.
Wait! There's also a Camp Wrap - more like a cape so you can wear a warm jacket underneath.
A wearable sleeping bag looks like a sleeping bag - with arms and open at the bottom for legs. There are wearable hoodie sleeping bags too. Some have separate legs so make a person look like they are in a thermal snowsuit. Maybe it is a thermal snowsuit with a sleeping bag rename.
Did I leave out the Napsack? That's the cozy and soft, cut close to the body, order-by-height bag with curved armholes and drawstring bottom?
I guess if I were a camper, this would be something I would know about.
Would you be wearing this when the air-conditioner gets too aggressive in the office? Like our picture, on a winter beach? How about outside on the porch as the snow falls or sitting around that cute fire-it. Or do you have a chilly attic office?
We're into grape harvesting with our big, bright cloud-filled October skies.