Sleeping Bag looks decent for kids. According to reviews it does fit adults with little room. I have bought 2 just incase my ife gets stuck in snow in car like last year and needs some warmth. Could even be used as a picnic blanket or even watching a film on he couch
Also Here is the Tesco description
The Tesco single sleeping bag has a polyester outer shell with a filling of 300 grams per square metre and polyfibre insulation to keep you warm and toasty. It has a comfort rating of 5°C to 9°C, ideal for home use and camping.
The sleeping bag features a 2-way zipper that enables 2 sleeping bags to be joined together to make a double. H180xW75cm.