You have never been so warm in a hammock before in your life, period. The elements are now a past time worry, no matter what time of year it is. The Spark turns your ENO hammock into a fortress, guaranteeing you'll stay warm and dry. A zipper free design and a convertible footbox keep you from struggling with your sleeping bag. Cold weather camping just caught on fire with the Spark.
The shell is constructed of 40D nylon Ripstop with water repellent finish. The lining is made of 30D nylon teffeta with water repellent finish. The insulation is made of high loft polyester synthetic fill, rated for an effective temperature range of 40 - 50 degrees Fahrenheit (when paired with a comparable under quilt).