Some backpackers like to really push the limits when it comes to warmth and weight. Some prefer to carry very light sleeping bags or quilts and then wear lightweight down gear to increase the warmth when needed as the temperature drops.
As we all know, good lightweight gear is expensive so when i came across this good quality Mountain Equipment Lightline down hood at a give away price of £2, yes £2 with free postage and packing i thought i would pass on the info. It will certainly keep your head warm in those light sleeping bags and also if your jacket is hoodless then it may be just what you have been looking for.
Anyway here it is if your interested.