Wigwam Thermax Cap II, Black, One Size The thermolite knit cap features the many benefits of thermolite polyester combined for lightweight packable warmth. Thermolite polyester is a lightweight fiber providing breathability and warmth while moving moisture from the body by combining a thermally efficient polymer with a micro-tested hollow core fiber that heats up quickly and retains warmth. This is a great basic cap where warmth and dryness in a lightweight design is important. It is also supported by wigwam and its 110+ year history and reputation as a quality family owned business that stands behind their products. This item is made in the USA and carries the wigwam 2-year guarantee. Visit www.wigwa,.com for more details Features Thin and lightweight packable tight-knit rolled cuff Thermolite cap Proven fit and function Once size fits all Lifetime Guaranty Thermolite warmth and moisture control in a lightweight knit hat USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.