Two jackets, three different weather situations - triclimate jackets are based on the original mountain layering system and, as such, are really versatile. For the ThermoBall™ Eco Triclimate Jacket, North Face have combined a waterproof, windproof and breathable 2.5-layer DryVent™ shell with a recycled polyester insulation layer. What's so special about that? The ThermoBall™ Eco insulation maintains its warmth even when wet, making it the perfect partner to a waterproof shell. Wear them tog