MiiOW Kids Acrylic Thermal Underwear Set Thickened Autumn Winter Pajamas Boys Long Johns Top and Bottom

Outer layer blocks cold air intrusion for layered thermal defense

Soft, elastic, and moisture-absorbent double-sided fleece

Anti-pilling, instant softness, and consistent warmth retention

Heat-sensitive color change indicating body temperature rise

Lightweight yet thick fabric providing air-warm sensation

High elasticity for unrestricted movement and comfort

Mid-high collar design to retain neck warmth

Elastic cuffs and reinforced hems for durability

Elastic waistband for a snug fit

Soft and comfortable inner heating fleece layer

Size Chart (Height cm / Weight kg / Garment Length cm / Chest Circumference cm / Pants Length cm):

120: 110-120 cm / 50-60 kg / 44 / 32 / 66

130: 120-130 cm / 60-70 kg / 47 / 34 / 72

140: 130-140 cm / 70-80 kg / 50 / 36 / 78

150: 140-150 cm / 80-90 kg / 53 / 38 / 84

160: 150-160 cm / 90-100 kg / 56 / 40 / 90

170: up to 170 cm / 100-110 kg / 59 / 42 / 96

The fabric’s heat-up feature causes a color change reflecting body temperature increase; variations in color change may occur due to production batch differences, which is normal.

Designed for warmth, comfort, and elasticity to support active lifestyles without burden.