The North Face ThermoBall Stretch Jacket

Now crafted of durable stretch taffeta to move with your body, TNF''s warm, packable ThermoBalltm powered by PrimaLoft® jacket is more versatile than ever before. Developed in partnership with Primaloft, Inc., ThermoBall is a revolution in insulation technology. Unlike traditional continuous filament synthetic insulation, the small, round PrimaLoft synthetic fiber clusters closely mimic down clusters, trapping heat within small air pockets to retain warmth. Independent clo testing by Kansas State University has shown that ThermoBall has warmth equivalent to 600 fill goose down. As a result, ThermoBall can offer the lightweight warmth and compressibility of down with the wet weather insulating performance of synthetic insulation. Body: 30D 72 gft178, 91% nylon, 9% elastane stretch taffeta with durable water repellent DWR finish Insulation: 11.5 gft178, PrimaLoft® ThermoBalltm synthetic insulated body and 15 gft178 insulated collar Midweight hybrid jacket with ThermoBalltm insulation and stretch panels ThermoBalltm powered by PrimaLoft® synthetic insulated body retains loft and warmth, even when wet Nylon stretch taffeta Molded tooth front zip Internal elastic cuffs Secure zip covered hand pockets Stowable in hand pocket Hem cinch cord Avg Weight: 521 g 18.4 oz Lifetime Warranty Center Back: 27.5 Active fit