Originally Posted by angrysparrow
For the true summer temps - a simple sleeping bag liner. They're relatively inexpensive, pack small and light, and have just about the right amount of material to have ~something~ on you.
They're often available in both silk or fleece. And you can find them on sale if you follow the gear prices from the larger distributors.
I've got a silk mummy bag liner that I was intending to use just as you've described, but not having done so yet I wasn't sure if just that alone would be sufficient, overkill, or otherwise...not to mention other possibilities.