This is active insulation made with THERMOLITE EcoMade material. Please ask if you have any questions about anything you can't see in the photos. m(_ _)m - Brand: FieldCore - Model Name: THERMOLITE Eco Mode Thermal Crew Neck - Size: LL - Color: Black - Material: 100% Polyester - Features: Heat retention, breathability 【Recommended Points】 ・High heat retention Uses THERMOLITE material, providing excellent heat retention. Ideal for outdoor activities, allowing you to stay comfortable even in cold environments. ・Comfortable to wear The mesh structure provides good breathability, keeping you comfortable even when you sweat. You won't feel stressed even after wearing it for a long time. ・Versatile Suitable for various outdoor scenes such as mountain climbing, camping, and fishing. It's also designed for everyday use. No stains, tears, or odors...