Men's Thermal Underwear Set – Compression Long Johns S–4XL
Men's Thermal Underwear Set – Compression Long Johns S–4XL
Men's Winter Thermal Underwear Set – Compression Long Johns
Stay warm and perform at your best with this men's thermal underwear set. Crafted from a high-stretch polyester-elastane blend, this two-piece compression suit is engineered to retain body heat while supporting an active lifestyle — perfect for gym sessions, outdoor runs, winter sports, or simply layering up on cold days.
Made in Mainland China.
Key Features
- Thermal Insulation: Knit construction traps warmth close to your body without adding bulk.
- 4-Way Stretch Compression: Polyester-elastane fabric moves with you, delivering a snug, supportive fit during high-intensity activity.
- Long-Sleeve Top + Full-Length Pants: Complete two-piece set covers you from wrist to ankle.
- Moisture-Managing Fabric: Helps wick sweat away to keep you dry and comfortable during workouts.
- Flatlock Seams: Minimises irritation during extended wear.
- Wide Size Range: Available in S / M / L / XL / 2XL / 3XL / 4XL to suit a broad range of body types.
- Versatile Use: Ideal as gym base layer, running tights, skiing undergarment, or everyday winter thermal.
Size Guide (Asian Sizing — Please Note)
⚠ Asian sizing runs 1–2 sizes smaller than European sizing. Please select based on your height and weight below:
| Size | Height (cm) | Weight (kg) |
|---|---|---|
| S | 165–175 | 55–65 |
| M | 165–185 | 55–75 |
| L | 165–190 | 65–80 |
| XL | 165–195 | 75–90 |
| 2XL | 170–200 | 85–100 |
| 3XL | 170–200 | 95–105 |
| 4XL | Contact us | Contact us |
If you are unsure of your size, please don't hesitate to contact us before ordering — we're happy to help you find the perfect fit.
Specifications
- Material: Polyester Blends / Elastane
- Weave: Knit
- Sleeve Length: Long Sleeve
- Sizes Available: S, M, L, XL, 2XL, 3XL, 4XL
- Gender: Men
- Item Type: Two-Piece Thermal Set (Top + Bottoms)
- Model Number: GZ125
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Learn more: HHS Move Your Way physical activity guidance
Frequently Asked Questions
Q: Is this men's thermal underwear set true to size?
A: This set follows Asian sizing, which typically runs 1–2 sizes smaller than European or Western sizing. We strongly recommend checking the size guide above and selecting based on your height and weight rather than your usual clothing size. When in doubt, size up or contact us for personalised guidance.
Q: Can I wear this thermal compression set for both gym workouts and outdoor winter activities?
A: Absolutely! The polyester-elastane compression fabric makes it an excellent base layer for gym training, running, cycling, skiing, and other cold-weather activities. Its thermal knit construction retains body heat, while the stretch fabric supports unrestricted movement.
Q: How should I care for this thermal underwear set?
A: We recommend machine washing on a gentle cycle with cold water and avoiding tumble drying on high heat to preserve the elastane fibres and maintain the garment's stretch and shape. Lay flat or hang to dry where possible.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.