Our ThemoNeutral down mid-layers features FORLOH’s Perf-Weld® technology that ensures exceptional breathability through micro-perforations in the Sonic Weld construction. Perf-Weld™ lets excess heat out when physical demands cause body temperature to rise. This keeps your body temperature neutral and you stay comfortable and drier, all day long.

• FORLOH’s propriety perforated sonic weld allows moisture to escape under pressure from high activity.
• Perforations are sized to not allow rain drops to penetrate.
• Made from extra soft and quiet rip-stop Nylon.
• Ergonomically designed to perform as the perfect mid / insulation layer.