Reddit mentions of Hot Headz Fleece Slumber Wrap Blanket with Sleeves and Snaps, Snow Flakes, 80 x 64-Inch

or

When not in use, it can be draped across a chair as a throwStay cozy & warm while keeping hand free to use phone, remote, or laptopUnlike a traditional wrap or snuggie, the blanket can be snapped and zippered closed to stay in place as you move aboutSnap bottom closed to prevent heat from escaping near your feetEasily machine washed and dried