I'm a bit claustrophobic so the idea of confining myself to a mummy bag hasn't set well with me from my youth. Until I can work out my issues, I decided to use a sleeping quilt instead of a bag. The up-side to this decision is that a quilt is much lighter than most traditional bags and many ultralight backpackers are switching to them even without the phobia. The best quilt I could find is made by Enlightened Equipment which has a variety of quilt styles in enough color combinations and custom configurations to give you exactly what you want. I went with the Revelation with DownTek™ Water Repellent Down. You can strap these quilts to your pad or open them up like a normal quilt in warmer weather. The best feature for me is the ability to open up the foot so I don't feel like I'm going to die. The downside is that each quilt is custom made so you'll need to wait 3-5 weeks for delivery. Customer service was great.