Sierra Designs Eleanor Sleeping Bag with DriDown - REVIEW
Lighter, warmer, more compressible, more durable, no petroleum products. The advantages of down over similar synthetic materials are evident. Simply re-read the list above. The main disadvantage, however, can be a big one; when wet, down looses its loft which means you lose your warm covering.
I understand why someone would opt for a synthetic sleeping bag. Besides being cheaper, a synthetic bag gives you the peace of mind that when it rains for hours and everything is getting wet, your bag should maintain a good portion of its warmth. Synthetic bags, however, are generally heavier and less compressible as well as debatably less durable than down bags.
Read more about the wonders of Sierra Design's DriDown and the Eleanor Sleeping Bag by giving a click here.