Men's Winter Thermal Fleece Leggings | Warm Underwear Pants

Your First Layer of Defense Against the Cold.

These heavyweight fleece thermal leggings are designed to keep you warm from the inside out. Soft, breathable, and built with a slim fit, they layer perfectly under any outfit — whether you're heading outdoors or staying in. The high elastic waist and ankle-length cut ensure a secure, comfortable fit all day long.

Product Highlights

Material: Polyester & Elastane fleece blend — heavyweight, warm, and stretchy
Fit: Slim / skinny fit — ideal for layering under pants or wearing at home
Waist: High elastic waist for a secure, comfortable fit
Length: Ankle-length
Features: Breathable, soft, and thermal — great for sleep, lounging, or outdoor layering
Season: Winter
Colors: Black, Dark Gray, Light Gray, Dark Blue

Size Guide

⚠️ Asian Sizing — Please read before ordering. Asian sizes run 2–3 sizes smaller than EU/US sizes. We recommend sizing up if you're between sizes or prefer a looser fit.

XL — Length: 71 cm / 27.95"
2XL — Length: 75 cm / 29.53"
3XL — Length: 79 cm / 31.10"
4XL — Length: 83 cm / 32.68"
5XL — Length: 87 cm / 34.25"
6XL — Length: 91 cm / 35.83"
7XL — Length: 95 cm / 37.40"
8XL — Length: 99 cm / 38.98"

Not sure about your size? Contact us with your height and weight — we'll help you find the perfect fit.