Biggreenbear.com
Men's Fleece Thermal Underwear Set: Black
Men's Fleece Thermal Underwear Set: Black
Couldn't load pickup availability
  Men’s Fleece-Lined Thermal Underwear Set – Big Green Bear
Extreme warmth meets ultimate flexibility. Engineered for the man who doesn't let the cold stop the mission, the Big Green Bear Thermal Base Layer Set is your first line of defense against the winter chill. Whether you're carving through fresh powder on a snowboard, tracking a buck in the deep woods, or just braving the morning commute, this top-and-bottom set keeps your core temperature steady and your movement unrestricted.
Core Performance Features:
- Ultra-Soft Fleece Lining:Â Crafted with a premium silky-soft lining (90% Polyester, 10% Spandex) that traps heat against the skin while feeling incredibly soft.
- Four-Way Stretch Compression:Â Designed for total freedom of movement. The high-performance stretch fabric keeps you looking slim while supporting your muscles during high-intensity activity.
- Breathable & Moisture-Wicking:Â Stay warm without the sweat. Our "Normal Thickness" software is breathable and lightweight, making it the perfect base layer that won't feel bulky under your clothes.
- Anti-Chafe Comfort:Â Featuring flatlock stitching to eliminate seam irritation. Wear it as a base layer or as a standalone compression sports shirt for yoga, running, or fitness training.
- The Perfect Fit:Â Thin enough to fit comfortably under a dress shirt or hunting camo, but heavy enough to serve as your primary warmth layer for skiing, climbing, and cycling.
Technical Specifications:
- Material:Â 90% Ultra-Soft Polyester / 10% Spandex
- Set Includes:Â Thermal Long-Sleeve Top & Full-Length Bottoms
- Care:Â Machine Washable (Imported)
- Color:Â Tactical Black
- Activity Level:Â High (Skiing, Snowboarding, Hunting, Winter Sports)
Size Guide (US Men's Thermal Underwear)
| Size | Chest (in) | Sleeve (in) | Top Length (in) | Waist (in) | Leg Length (in) |
|---|---|---|---|---|---|
| Small | 34" | 25.4" | 23.2" | 26" | 35.5" |
| Medium | 36" | 26.6" | 23.5" | 26.8" | 36.4" |
| Large | 38.4" | 27.0" | 23.6" | 28.8" | 37.2" |
| XL | 40" | 27.4" | 23.6" | 30.4" | 38.0" |
| 2XL | 40.8" | 28.2" | 25.0" | 32" | 38.1" |
| 3XL | 44" | 29.2" | 26.0" | 34" | 39.0" |
Â
The Big Green Bear Difference
Don’t settle for itchy, restrictive long johns. Our thermal set is designed to work as hard as you do, providing a "second skin" feel that manages moisture while locking in heat. From the flatlock seams to the flexible compression, every detail is mission-ready.
Gear Up Risk-Free: We stand behind the warmth and quality of our winter gear. If this isn't the most comfortable base layer you've ever owned, we offer a 30-day money-back guarantee.
Start Your Easy Return or Exchange Here
[Add to Cart – Defeat the Cold Today]
