Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
-70%
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top
Ultra Technical Base Layer Top

Ultra Technical Base Layer Top

$99.00 $29.70
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Size
Color
Size chart
Men's Outdoor Pants
US Size Waist (in) Hip (in) Inseam (in)
S 29 – 31 35 – 37 32
M 32 – 34 38 – 40 32
L 35 – 37 41 – 43 32
XL 38 – 40 44 – 46 32
XXL 41 – 43 47 – 49 32
Women's Outdoor Pants
US Size Waist (in) Hip (in) Inseam (in)
XS 24 – 25 34 – 35 30 – 32
S 26 – 27 36 – 37 30 – 32
M 28 – 29 38 – 39 30 – 32
L 30 – 32 40 – 42 30 – 32
XL 33 – 35 43 – 45 30 – 32
Jackets & Outerwear (Men & Women)
US Men's US Women's Chest (in) Waist (in) Sleeve Length (in)
S XS 36 – 38 25 – 27 31 – 32
M S 39 – 41 28 – 30 32 – 33
L M 42 – 44 31 – 33 33 – 34
XL L 45 – 48 34 – 37 34 – 35
XXL XL 49 – 52 38 – 41 35 – 36
Footwear & Accessories
US Men's US Women's Foot Length (in) EU Size Sock / Mitten Size
7 8.5 9.6 40 S
8 9.5 10.0 41 M
9 10.5 10.4 42 M
10 11.5 10.8 43 L
11 12.5 11.2 44 L
12 13.5 11.6 45 XL
13 14.5 12.0 46 XL
📏 How to Measure:
• Pants: Measure waist at the natural waistline, hips at the widest part. Inseam is measured from the crotch to the ankle (Standard Regular is 32", Short is 30").
• Jackets: Measure chest under the arms and around the fullest part. Keep the tape slightly loose for layering.
• Footwear: Measure foot length from heel to longest toe while standing. If you plan to wear thick hiking socks, consider sizing up by half a size.
• All measurements are in inches. If you are between sizes, we recommend sizing up for a more comfortable fit during outdoor activities.
  • Free worldwide shipping
  • In stock, ready to ship
  • Inventory on the way

A technical, premium base layer top made for demanding activities.

**The Ultra Technical Base Layer Top is the right choice if you:**

- Need a premium, moisture-wicking base layer with advanced Polartec® technology
- Want quick-drying, breathable comfort for alpine performance
- Prefer lightweight stretch fabric with a streamlined fit

Designed for demanding alpine layering, the Ultra Technical Base Layer Top keeps you dry, warm, and comfortable through high-output activity. Crafted with Polartec® Power Grid™ Light fabric, it traps air efficiently while providing four-way stretch, excellent breathability, and superior moisture management. A crew neck design and side slits ensure comfort and mobility, making it a versatile foundation for any layering system. Breathable, quick-drying, and built for performance - the Ultra Technical Base Layer Top is your go-to base for alpine missions and beyond.

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