There's no tags or name brand that I saw but it is most alike to the Coleman, TETON Sports, or REDCAMP sleeping bags.

Stay warm and cozy in cold weather with this lightweight flannel-lined sleeping bag designed for temperatures as low as -30°F. The rectangular shape and large size make it suitable for one person, while the synthetic insulation and hollow cotton fill provide superior insulation. Perfect for camping, this sleeping bag is both durable and easy to carry, making it a must-have for outdoor enthusiasts looking to stay comfortable in colder climates. The blue color and nylon shell add a stylish touch to this practical and reliable outdoor gear.