Eno Vulcan Underquilt is basically an item designed for 35-45 degree weather. It is said that this product is a full length quilt supported with the synthetic insulation. The product is quite elastic so that it is secure to the ends of the hammock. Besides, it can provide weight to thermal efficiency. Unfortunately, this product isn’t proper for below 50-55 degrees weather if you don’t bring any foam pad since this product cannot keep your warm. Besides, it is said that this product is a little bit more expensive comparing to the other products. So, it depends on your choice to purchase for this product or not.