Soft MicroFiber fabric * TechLoft+ insulation * Compacts into standard, drawstring stuff sack (included), so it won"t take up much room * The 10" x 20" has stuffed dimensions of 6.5" x 9" and weighs 8 ounces * The 16" x 24" has stuffed dimensions of 7" x 10.5" and weighs 16 ounces