I seem to have stumbled onto the Betterware website

Ah yes, the slanket, beloved of people who have stopped being merely careful with the heating bills, and are now positively miserly.

This loose, baggy monster would do very well as a bus shelter, especially on Clifton Street, where, as night follows day, one must wait for the Number 9 bus driver to take a grateful drag on a Silk Cut, pour out a cup of tea from a flask, balance it carefully on the dash, shake out the Daily Star, check a few household details over the phone with the missus, and FINALLY allow you to board the bus.  He'll save the gratuitous rant at a hapless old lady for later.

This is a Warehouse item, by which I mean it's used to house pallets.  It's also 100% acrylic:  you may as well break out in hives now and save yourself some time.

Warehouse, via Asos, £48.