OneWind Underquilt is one of the most affordable underquilts in the market - for only $69.90 (or $114.90 for the Hammock Underquilt and Blanket Combo). This sturdy water-resistant lightweight hammock quilt is made with 1.1oz. 20D 400T ultralight nylon fabric and filled with DuPont Sorona Bio-Based Fiber SustansInsulation. It’s highly elastic, fluffy, warm, soft, and smooth that’s perfect for both hot and cold weather. Designed for hammock enthusiasts diagonal lay.