Klättermusen Idun 2.0 Down Tee Unisex | Molten Lava
The Idun compact lightweight down tee is designed to give extra warmth in your core. It features 800+ Fill Power and box construction but is light enough to fold into its own pocket. The shoulders are reinforced to prevent abrasion and improve water resistance. The outer material is our proprietary Levitend® recycled polyamide. Never leave home without it.
The Heat Conductivity Resistance System
The Heat Conductivity Resistance (HCR) system is a performance value for thermal equipment that measures the warmth of a piece on a scale of 3 to 9, with 9 providing the most warmth. HCR combines the difference in insulation materials, external conditions, and body sensitivity.