Midweight merino
Pure merino wool in a 250g-class knit provides midweight warmth for cool-to-cold days.
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Coreline AR Merino 250 Baselayer Top
In the field
A midweight 100% merino wool long-sleeve crew baselayer for cool-to-cold conditions and clean layering.
Moisture and temperature control
The fabric is moisture-wicking, temperature-regulating, odor-resistant, and offers UV protection.
Layer-ready coverage
The long-sleeve crew design works as a base layer for skiing, cold-weather training, hiking, and travel.
Construction and materials
- Material
- 100% merino wool
- Fabric class
- Midweight, 250g class
- Neckline
- Crew
- Sleeves
- Long
- Fabric features
- Breathable, stretchable, moisture-wicking, odor-resistant and temperature-regulating
- Sun protection
- UV protection; no numerical UPF supplied
- Fit
- Comfort fit
- Finish
- Solid-color knit
- Color options
- Green, Black, Navy, Burgundy
- Size options
- S, M, L, XL, 2XL
- Size chart scope
- Reference body chart XS–4XL; only selector choices are purchase options.Body measurements, not garment dimensions; sleeve measured from center back of neck to wrist
- Chart fit advice
- Between sizes, size up for a relaxed fit
This is your next-to-skin engine room: 100% merino wool, long sleeve, midweight warmth (250g class). It manages heat when you’re moving, holds steady when you’re stopped, and fights stink when the day goes long. Clean crew neck. Solid knit. Zero fluff.
Key Features
-
100% pure merino wool construction
-
Midweight fabric (250g class) for cold-to-cool days
-
Odor-resistant performance for repeat wear
-
Temperature regulating merino microclimate control
-
Moisture-wicking to keep sweat from pooling
-
UV protection for high-exposure days
-
Long sleeve crew design built for layering
-
Solid color minimalist look that disappears under your kit
Recommended Use
Run it as the base for ski days, cold-weather training, shoulder-season hikes, and travel where you’re packing light and wearing hard. Best in cool to cold conditions with mixed output—add insulation when the pace drops.
Bottom Line
Midweight merino. Long sleeve. All gas, no noise.
Men's Tops — Size Chart (XS–4XL)
Measurements reflect body measures, not garment dimensions. If between sizes, size up for a relaxed fit.
| Size | Chest (in) | Chest (cm) | Waist (in) | Waist (cm) | Sleeve* (in) | Sleeve* (cm) |
|---|---|---|---|---|---|---|
| XS | 32–34 | 81–86 | 26–28 | 66–71 | 31–32 | 79–81 |
| S | 35–37 | 89–94 | 29–31 | 74–79 | 32–33 | 81–84 |
| M | 38–40 | 97–102 | 32–34 | 81–86 | 33–34 | 84–86 |
| L | 41–43 | 104–109 | 35–37 | 89–94 | 34–35 | 86–89 |
| XL | 44–46 | 112–117 | 38–40 | 97–102 | 35–36 | 89–91 |
| 2XL | 47–49 | 119–124 | 41–43 | 104–109 | 36–37 | 91–94 |
| 3XL | 50–53 | 127–135 | 44–47 | 112–119 | 37–38 | 94–97 |
| 4XL | 54–57 | 137–145 | 48–51 | 122–130 | 38–39 | 97–99 |
*Sleeve measured from center back of neck to wrist. 1 inch = 2.54 cm.
Recommended for You
FAQ
How can I reach Alpine Extreme if I have questions?
Email [email protected] or use our contact form.
Do you offer free shipping?
Free standard shipping is available to most addresses worldwide. Availability, delivery estimates, and any expedited charges depend on the destination and order. International duties, tariffs, and customs fees remain the customer’s responsibility. See our Shipping Policy for details.
What's the return policy at Alpine Extreme?
Eligible return or exchange requests must be submitted within 45 days of the order date. Items must be new and unused with original packaging, tags, and accessories. General change-of-mind returns are not accepted. Return-shipping responsibility depends on the reason for the return. See the full Return & Refund Policy for exclusions and refund timing.
How long will it take for my order to arrive?
Orders are typically processed within 2–5 business days. Most standard shipments arrive within 7–14 business days after shipping, depending on destination and carrier conditions. Delivery estimates are not guaranteed.
Can I track my order?
Yes. Tracking details are emailed after shipment. You can also check order status with your order information through our order-tracking page.
What if there's an issue with my order?
Email [email protected] or submit the form on our support page. Report delivery issues within 60 days of the order date so carrier information is still available.
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