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W's Swift Tech Mockneck LS in Astral

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Sustainable materials, responsibly made.

  • Atlantic

  • Color Astral

    Color Astral

    Color Astral

    Color Astral

    Color Astral

W's Swift Tech Mockneck LS in Astral

Gabby wears size S and is 5'08" Slim fit, Size Chart
Complete the look with the W's 7/8 Groundwork Tight

The Swift Tech Mockneck LS is a an ultra-soft, moisture-wicking, alpine inspired base layer with the enhanced benefits of merino and Polygiene® anti-odor control. Designed for repeat use between washes, you can wear it as a stand alone top or as your bottom layer. Read more

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behind the design

behind the design






Fitted but not skin tight, the Swift Tech Mockneck LS is meant to function on its own as a long sleeve top or as an optimal base when layering up. The fabric breathes and excels at wicking moisture swiftly away from the body and dispersing it along the fabric face for faster drying. The ultra-soft poly-merino jersey, while intended for high-output in colder pursuits, is thermoregulating to maintain comfort through a wide flux of temps. With alpine-inspired styling and the addition of Polygiene® anti-odor control, this essential cold weather layer can be worn more and washed less.



Moisture-wicking comfort
Ultra-soft, thermoregulating merino/poly jersey provides fast moisture-wicking management to quickly move sweat + heat away for comfort during prolonged efforts

Stays fresher longer
Polygiene® permanent anti-odor control keeps the fabric fresher for longer, so you can use it more between washing — reducing water + energy consumption

Quick dry
DriRelease jersey speeds up dry times

Wear it on its own or as a base
A snug but not skin-tight fit makes for super easy layering and wearability on its own

Ergonomic seaming
Contoured arm hole with racerback seams allow for freedom of movement

Alpine inspired styling
Mockneck style adds extra neck protection with our signature tonal ladder stitch on back

Better thumb slits
Integrated thumb slits built into the cuffs essentially disappear when not in use

Hang it up
An elastic locker loop is integrated into the back collar 

materials + specs

materials + specs

Swift Tech with Polygiene® anti-odor control
84% polyester, 11% merino, 5% spandex drirelease

162g / 5.7oz (W’s Small)

Garment made in Vietnam



Swift Tech is treated with Polygiene® anti-odor control to inhibit and prevent the growth of bacteria that causes stink. Studies show that washing and caring for garments makes up 2/3 of the environmental footprint over the lifespan of apparel — by wearing more and washing less, even just wearing something twice between washes, can save energy and water, reduce CO2 emissions and minimize micro-plastics.

Swift Tech is also OEKO-TEX® certified meaning it is free from harmful chemicals and is fabricated in a way that meets a high environmental standard.

Learn more about our sustainable initiatives here.

Customer Reviews

Based on 26 reviews
Great shirt

It's warm for cool weather and is a great base layer. It's also very breathable and soft.

The perfect base layer you can wear alone.

I wore this for a 100-mile bike packing trip in Big Bend. The temps ranged from 35-70. It was perfect alone, under a vest or under a cycling jersey. It's PERFECT. Also suuuper soft. Fit is so sleek!


I love this - fits perfectly, the perfect light weight running layer. Comfortable fabric.


Never received my purchase

Love it!

The best merino tech shirt ever. It's so comfortable, flattering, and breathable. I bought one for my husband, brother, and sister-in-law for Christmas because I want them to get on my comfort level.