Responsibly Sourced. Certified for Confidence.
We choose merino wool with care — sourced from responsible farms and backed by trusted certifications including RWS, Woolmark®, and OEKO-TEX® STANDARD 100. Soft on your skin, thoughtful from the source.
This 100% merino wool ¼ zip base layer features thumbholes for easy layering. Merino wool's natural insulation keeps you warm and dry in cold, damp conditions while regulating temperature and wicking moisture during high-intensity activities to prevent overheating and keep you fresh.
Fabric:
Material: 100% Merino wool from Australia - about merino wool
Fabric Weight: 250gsm
Knit: Interlock Knit
Fiber Diameter: 18.5 micron
UPF Rating: 50+
Woolmark® Certified
OEKO-TEX® STANDARD 100 Certified (Class I – Baby Safe)
Responsible Wool Standard® (RWS) Certified
Fit Type: Slim fit design follows the body’s natural curves and moves with you.
Layer Type: Base layer, first layer, mid layer - Learn more
Flatlock Seams: Reduce friction and ensure lasting comfort
Thumbholes: Allow for easy layering and added hand warmth
Quarter Zip: Provides easy temperature control during strenuous activity.
Higher Neck: Provides extra neck coverage and warmth when worn down.
Interlock Knit: Dense double-knit construction enhances durability, wind resistance, and warmth.
Style #: MT08
Ideal Seasons: Spring, Summer, Fall, and Winter
Activities: Long hikes, travel, camping, biking, running, fishing, hunting, and snow sports.
Wash with like colors
Do not bleach
Do not tumble dry
Line dry in shade
Do not dry clean
Machine wash warm
Learn more
90-Day Warranty - Returns Policy
One-Year Extended Warranty with Registration - Warranty Policy
We choose merino wool with care — sourced from responsible farms and backed by trusted certifications including RWS, Woolmark®, and OEKO-TEX® STANDARD 100. Soft on your skin, thoughtful from the source.
I loved my first one that I used for almost 60-day in France and Spain that I wanted a second one. That thermal top with MP t-shirt and vest were all I needed for very cool spring mornings during the trip. The quality is beyond comparison the my other well-known outdoor clothes. I highly recommend MP products. I now have several t-shirts, socks, thermal tops and a bottom.
I bought this half zipper as a last minute for my trip starting on April 9. And I used it probably 20 days and handwashed it probably 6 times. I held up and best, it kept me warm over another Merino Protect t-shirt in early morning chills. There were a couple of days in the Pyrenees and Aragon when it was close to freezing and I had to add the Merino wool vest (that I also bought at last minute) under my light down sweater. The four layers were perfect for hiking. The fabric was soft and supple, not itchy like other brand names. Highly recommend Merino Protect clothes.
Love this piece. I have a couple in different colors. Pack one for my journey everytime. Works as a stand alone, layered piece. Easy care and replaced other pieces of clothing I used to pack
Come da titolo, il prodotto si presenta bene e ha una buona mano . Vedremo la durata nel tempo
This is a good long length over onto your bum, good long zip to cool.you or zip in the warmth, feels fine and smooth, no itchiness. I like it a lot. Good value. I haven't washed it so no idea how it will be long term, but it feels good on so far