Superior by design and construction, the KUHL WOMEN'S FIREFLY HOODY features lightweight PRIMALOFT GOLD insulation for enhanced breathability, flexibility and protection from the elements. With superb warmth-to-weight ratio and continued insulation when wet, PRIMALOFT GOLD delivers body warmth in harsh conditions. A second insulator, PRIMALOFT GOLD ACTIVE, adds four-way stretch for greater freedom of movement. Engineered for high aerobic activities, this flexible insulator provides temperature regulation and stability: it won't shift during intense action. AIRPERM soft shell panels on the elbows, arm and side panels are strategically placed over the PRIMALOFT GOLD ACTIVE insulation for the ultimate in breathability and flexibility.