(4 customer reviews)

Made for life

Merino Betatec Short Sleeve Base Layer

Thermo regulating, super durable merino betatec short sleeve base layer. Woolmark certified, guaranteed quality and made for life. Stay comfortable, light and super breathable during all your outdoor activities in cool to warm conditions. Expect to feel embraced by it’s sumptuous comfort and transcended by its ability to perform as a true technical piece of kit. Whether you are powering up the trails on your chilly morning run or enjoying coffee and cake afterwards with friends, the Merino Betatec is ready to become your companion for life.



Performance Benefits



Thermal Comfort

odor res

Odour Resist


Super Durable

No Itch Wool


Dynamic stretch

Technical Features


Superfine Merino Wool worn next to skin, the perfect buffer for managing moisture and thermal regulation


Pushes the bounderies of what is technically possible in lightweight merino-based products


Total Easy Care convenience. Wear often and wash less saving on water and energy consumption


Engineered Knitting innovation means fewer seams, less waste and dynamic stretch in a snug fit

75% Merino Wool | 20% Nylon | 5% Elastane

Super fine 17.2 micron merino with Suedwolle Beta spun nylon technology, knitted by our partners Clothius in Portugal using fine gauge seamless knitting technology. Both yarn and fabric are certified Oeko-tex and free from concerning chemicals. The garment has a technical hand and superior durability without compromising the unique merino benefits.



4 reviews for Merino Betatec Short Sleeve Base Layer

  1. Dawn (verified owner)

    I was lucky enough to test this during a recent ultra marathon. It was 23C and sunny. Although I was hot the top kept me comfortable throughout the run and crucially didn’t whiff even after being taken off and balled up into my bag for 24 hours until I got home.

  2. Elaine

    My go to t shirt/ short sleeve top. In the winter I was addicted to the long sleeve version and now same addiction to the short sleeve. Unbelievably comfortable I pretty much wear it for doing horses and dog walking every morning ( currently beginning of July) . Washes well and dries quickly. Couldn’t be happier. Thankyou Loomi !

  3. Amanda Runciman

    I was in a dilema what to wear while walking the West Highland Way in July 2022. I bought the short sleeve top and thought it was too wee for me but that is how it works. While out for practice walks in the heat I was sweating but after taking the top off you would hardly know – where does that sweat go? I wore this top for all 4 days of my WHW walk and never needed to wash it out in the evening. The last day we had rain so I wore a waterproof coat on top and on the way home was a cosy as pie with my short sleeved top on as there was no sweat and no rain on it. Would highly recommend the short sleeved top for any activity.

  4. Lindsay Robinson

    Purchased the short sleeve t-shirt about 10 minutes before running the tweed valley trail race – 20km.
    I was so impressed with how it performed. You basically have to wait about ten minutes for the t-shirt to get to your body temperature and then after that you dont even feel like you have it on.
    The best part was on the hills, amazing windstopping, its a indescribable feeling of comfort. Because the top is fitted but not in a compression way, you get no drag from wind on the hills. Highly recommend

Add a review

Your email address will not be published. Required fields are marked *

Technical Innovation
Suedwolle spinning technology combines merino fibres with technical nylon filaments to achieve an even higher level of performance and durability.
Knitting Innovation
Fine gauge circular knitting technology creates the perfect finished product. Light yet durable, soft yet strong, dense yet super stretchy.