Heavyweight fleece warmth
A brushed fleece interior traps heat while the wind-resistant outer face reduces chill under a jersey or shell.
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Frostskin ST Thermal Cycling Baselayer
In the field
A heavyweight fleece-lined cycling baselayer made from 85% polyester and 15% spandex for cold-weather riding.
Durable stretch knit
The 85% polyester and 15% spandex fabric stretches, dries quickly, and combines anti-pilling, anti-shrink, and anti-wrinkle construction.
Cycling-focused fit
The next-to-skin pull-on design has full sleeves, a crew neck, and flat stitching. It runs small; size up if between sizes.
Construction and materials
- Material
- 85% polyester / 15% spandex
- Fabric class
- Heavyweight
- Interior
- Brushed fleece
- Outer face
- Wind-resistant
- Fit
- Next-to-skin athletic fit
- Stretch
- Four-way
- Neckline
- Crew
- Sleeves
- Full length
- Closure
- Zipperless pull-on
- Seams
- Flat stitching
- Fit advice
- Runs smaller than US standard; size up when between sizes
- Fabric features
- Moisture-wicking, quick-drying, anti-pilling, anti-shrink and anti-wrinkle
Fit, options and reference notes
- Output
- Low to mixed output
- Color options
- White, Black
- Size options
- S, M, L, XL, 2XL, 3XL
- 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
Cold rides. Zero mercy. This is a heavyweight synthetic thermal baselayer built to trap heat, block wind, and stay glued to your skin when temps dive. Brushed fleece inside. Stretch knit outside. Built for winter miles, not café stops.
Key Features
-
Heavyweight fleece interior locks heat fast and holds it
-
Synthetic knit (85% polyester / 15% spandex) for stretch, durability, fast dry
-
Wind-resistant outer face cuts chill under a shell or jersey
-
Anti-pilling, anti-shrink, anti-wrinkle—ride it hard, wash it often
-
Next-to-skin athletic fit for efficient moisture transfer
-
Full-length sleeves + crew neck = full coverage, no gaps
-
Flat, clean stitching reduces rub under packs or armor
-
Zipperless pull-on design—simple, fast, nothing to fail
Recommended Use
Built for cold-weather cycling, MTB, road training, commuting, and moto layers from late fall through deep winter. Best for low to mixed output days when wind and cold are the enemy and warmth matters more than max airflow. Size runs smaller than US standard—size up if between.
Bottom Line
Heat in. Cold out. Ride anyway.
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.
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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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