Stretch of midnight blue cloth patterned with decorative gold threads on one side.
With a Note: 'Dear Martin Happy Birthday!
you can curl up in this and it'll keep you cool in the summer and warm in the winter. you won't need another blanket.
If you fold it into a triangle with the gold side out, it will turn into a little sleeping bag for Longcat. I put a Notice-Me-Not charm on it, but it only works when it's a sleeping bag. I'm sorry.