Only the absolute lightest of materials are used to create the "Hadron". 20% lighter than our Original Down Beanie the Hadron is constructed from Membrane 7 and 950+ goose down fill. This super ultra-light Ripstop Nylon weighs in at a scant 0.56oz/yd2 and also uses more Eco-Friendly DWR treatment that is PFC free.
With an ultra-soft feel and a beautiful deep black sheen this BlackRock Hat is the lightest ever. For those gram counters the medium Hadron barely tips the scales at 19.9 grams. If weight and warmth matter you can't get any better than the Hadron for those super ultralight hikers.
Size Head Size (inches) Weight (grams) Medium 20-22 19.8 Large 22.5-24 22.2 X-Large 24.25-26 24.0