Description of The North Face Thunder Jacket The pinnacle, ultralight mid-layer for The North Face athletes: a luxuriously insulated, highly compressible jacket for multi-purpose backcountry use. Features: Body: 20D 35 g/m² (1.0 oz/yd²) 100% nylon ripstop with DWR Insulation: 800 fill goose down 28" length 380 g (13.4oz) Performance fit Two hand pockets Jacket stows in hand pocket Elastic bound cuffs Hideaway hem cinchcord