Extremely warm for its weight, easy to work with and sew, and durable enough to withstand a few mistakes and seamrips :) Will definitely use synthetic insulation more often!
Used to improve insulation in a TNF jacket and made a sleep beanie. Lightweight and warm.
Climashield APEX - 2.5 oz/sq yd
I made some insulated pants with 2.5oz APEX, attached only at waist and ankles. Seems to be holding up. The pants are warm enough to not feel the cold in single digits F on the short walk in to the office. Not sure about sustained cold yet.
Received the insulation on time and as ordered. Plan to double (5 oz/yd) for summer quilt (possibly ≥32F & good if moist) with Ripstop by the Roll 0.66 oz/yd MEMBRANE 10 taffeta nylon material (≈20 oz). Also, plan to use these same materials to sew a weather strip behind the zipper on my Enlightened Equipment Torrid APEX Custom parka.