Zaisuo Lamb Fleece Thickened Men's Thermal Base Shirt Autumn Winter Cold-Resistant Warm Innerwear Heating Mid-Neck Single Top

Double-sided thickened lamb fleece with double-sided warm fleece

High-density fabric with strong heat retention and temperature locking

Advanced far-infrared heating technology for rapid heat accumulation and significant body temperature increase

24-hour continuous warmth with heat convection inside the garment core to reduce heat loss

Skin-friendly, soft, comfortable, and durable heat retention

Tested and certified by CNAS with far-infrared emissivity ≥0.88 (before washing) and radiation temperature rise ≥2.2 (before washing)

Comfortable half high collar design with elasticity, skin-friendly and resistant to deformation

Fine and dense stitching, durable and resistant to pilling

Uniform heat distribution for consistent warmth, suitable for temperatures ranging from -5°C to -15°C

Technology ensures constant temperature and effective cold resistance