It&&';;s all about the warmth. The Bruggen hunting beanie with Heat Boost(TM) graphene technology offers all day head warmth during cold weather hunts. Heat Boost is a pioneer in the next generation of fabrics with new functionalities. Knitting graphene yarn into our sherpa lining super charges it with the thermal conductivity, moisture wicking and antimicrobial capabilities inherent to graphene. In essense, we took a warm material and made it evern warmer- 30% warmer. It&';s heat you can really feel. The beanie is made with a quiet 4-way stretch performance fleece treated with a DWR finish to shed light moisture. The interior is fully lined with Heat Boost graphene sherpa fleece for outstanding warmth that you will quickly feel. The sides are curved to ensure your ears are covered. Graphene is changing how we make extremely warm, yet thin, cold weather accessories. Pull on this Heat Boost(TM) hunting hat made in TarnenA(R) Camo for all day lasting warmth so you stay out longer no matter the temperature Features: Shell Material: Double layer fabric composed of 4-way stretch peached knit polyester bonded to Heat Boost(TM) graphene sherpa Heat Boost(TM) graphene technology: A line of enhanced fabric super charged with graphene&';s thermal conductivity, moisture wicking and antimicrobial properties DWR: Durable Water Repellant (DWR) finish on fabric face sheds moisture and light snow