• Powerful Insulation: This heavyweight thermal underwear top provides powerful insulation to help retain body heat, keeping you warm, protected, and comfortable in extreme cold weather conditions.
• Robust Material Construction: Constructed from durable heavyweight raschel knit fabric, this military thermal underwear shirt is designed to hold its shape and resist wear, delivering reliable warmth and long-term performance as a cold weather base layer.
• Comfortable Design: Featuring elastic ribbed knit cuffs, this thermal knit underwear top creates a secure seal between your cold weather gear and gloves, helping trap heat while blocking out cold air.
• Ideal for Extreme Cold Weather: Built for outdoor enthusiasts, tactical professionals, hunters, skiers, and anyone who depends on dependable extreme cold weather gear, this thermal base layer top performs in harsh winter environments.
• Long-Lasting Comfort: Rothco’s Heavyweight Thermal Knit Underwear Top offers lasting comfort, dependable insulation, and consistent performance, making it an essential piece of extreme cold weather thermal underwear.

Built for cold weather conditions, the Heavyweight Thermal Knit Underwear Top delivers dependable warmth when temperatures drop. Designed as a cold weather base layer, this military thermal shirt helps retain heat while remaining comfortable during extended wear. The heavyweight knit construction provides durability and insulation, making it well suited for winter outdoor activities, tactical use, work environments, and everyday cold climate wear. Powerful Insulation: This heavyweight thermal underwear top provides powerful insulation to help retain body heat, keeping you warm, protected, and comfortable in extreme cold weather conditions.  Robust Material Construction: Constructed from durable heavyweight raschel knit fabric, this military thermal underwear shirt is designed to hold its shape and resist wear, delivering reliable warmth and long-term performance as a cold weather base layer. Comfortable Design: Featuring elastic ribbed knit cuffs, this thermal knit underwear top creates a secure seal between your cold weather gear and gloves, helping trap heat while blocking out cold air. Ideal for Extreme Cold Weather: Built for outdoor enthusiasts, tactical professionals, hunters, skiers, and anyone who depends on dependable extreme cold weather gear, this thermal base layer top performs in harsh winter environments. Long-Lasting Comfort: Rothco’s Heavyweight Thermal Knit Underwear Top offers lasting comfort, dependable insulation, and consistent performance, making it an essential piece of extreme cold weather thermal underwear.