Thermal Base-Layer Long Sleeve Undershirt

Overview Thermal insulation: Fleece-lined fabric provides excellent warmth retention for cold weather comfort Slim fit design: Contoured cut offers a streamlined silhouette that can be worn as both base layer or standalone top Round neckline: Classic collar style ensures comfortable wear and easy layering under other garments Derong fabric: Premium acrylic blend material with moderate weight (181-200g/m�) for balanced warmth and breathability Versatile wear: Suitable as thermal underwear or casual outerwear with solid color options   Specifications Material: 70-80% acrylic fiber (Derong fabric) Weight: 181-200g/square meter Layers: Double layer construction Neckline: Round neck Sleeve: Long sleeve Colors: Black fleece, White fleece-lined, Dark gray plus velvet, Light gray plus velvet Sizes: M, L, XL, 2XL, 3XL, 4XL, 5XL Function: Thermal insulation Pattern: Solid color Packaging: Bagged   Packing List thermal underwear*1