The Thermolite Jacket has been specifically designed to provide maximum core warmth and comfort without the bulk of traditional insulated jackets. Ideal for alpine hunting when you're likely to be static and glassing for extended periods in extremely cold climates. Highly packable, the Thermolite Jacket conveniently stows into its cram bag and is ready to go for when you slow down on the hill or for when you're back around camp during plummeting temperatures.