The ThermoFlex Hooded Vest (previously Thermolite) has been specifically designed to provide maximum core warmth and comfort without the bulk of traditional insulated vests. Ideal lightweight layering to wear underneath your rainproof shell when you’re likely to be static and glassing for extended periods in extremely cold climates. Highly compactable, the ThermoFlex Hooded Vest is your first choice insulation layer that will be ready-to-go when you slow down on the hills or for when you’re back around camp during plummeting temperatures. Weight 640grams