Size Guide
Size guide description
Size | Collar | Chest |
---|---|---|
S | 14.5" | 36" |
M | 15.5" | 40" |
L | 16.5" | 42" |
XL | 17.5" | 44" |
2XL | 18.5" | 46" |
3XL | 19.5" | 50" |
4XL | 21" | 54" |


Klazig Wool Rich Thermal Long Pant – Traditional Men's Thermal Underwear for Cold Weather Comfort
Stay warm in timeless style with the Klazig Wool Rich Thermal Long Pant, the essential winter base layer for men who value comfort, practicality, and quality. Designed to combat harsh weather, this wool blend thermal underwear is crafted with a unique 3-layer construction that delivers exceptional warmth without compromising on breathability or fit.
The inner layer, made from soft cotton, sits gently against your skin, while the outer wool-rich layer provides natural insulation. A touch of polyacrylic and polyamid ensures long-lasting durability and shape retention – even after repeated washes. Whether you're working outdoors, enjoying winter walks, or simply layering up, these thermal long johns are the reliable cold-weather companion every gentleman needs.
Key Features:
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Men’s wool-rich thermal long pant by Klazig – ideal for winter layering
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Innovative 3-layer fabric: cotton inside, wool outside for warmth and comfort
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Fly front opening for ease and traditional styling
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Machine washable men’s thermal underwear – easy care for everyday use
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Tailored for cold climates, active wear, or outdoor work
Fabric Composition:
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46% Cotton – Soft against the skin
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14% Wool – Natural insulation and warmth
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32% Polyacrylic – Keeps its shape and resists wear
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8% Polyamid – Adds strength and long-lasting performance
Don’t let the cold slow you down – trust Klazig Thermals to provide classic comfort and dependable warmth. The Klazig Wool Rich Long Pant is a wardrobe staple for any man seeking traditional thermal base layers that blend style, practicality, and enduring quality.
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Cotton Care
For men’s cotton shirts and garments, wash in cold or warm water using a mild detergent, avoid bleach, tumble dry on low or line dry to prevent shrinkage, and iron while slightly damp for best results.
Wool Fabric Care
To care for men’s wool jumpers, suits, and knitwear, hand wash in cold water or use a wool cycle with a wool-safe detergent, always lay flat to dry, steam out wrinkles instead of ironing, and store garments folded to avoid stretching.
Man-Made Fabric Care (Polyester, Nylon, etc.)
Men’s clothing made from man-made fabrics like polyester or nylon should be machine washed cold, dried on low or air-dried to avoid heat damage, ironed on a low setting or steamed if needed, and benefits from being wrinkle-resistant and low-maintenance.
All orders are processed and shipped with Royal Mail within 2 business days, except when an order is received during a holiday period, the order is then shipped on the next working day after said holiday.