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Helio Tech Tee

Regular price £40 Sale price £28
Unit price  per 

Helio Tech Tee

W's Helio Tech Tee

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Gabby is 5'8" and wears size S
Camilla is 5'7" and wears size L
Regular fit , Size Chart

Your hottest runs have finally met their match — ultra-light and super fast-drying, the Helio Tech Tee has a textured interior so it stays cling-free and comfortable, even on your sweatiest adventures.

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Reflective hangcord at neck speeds up drying time

Stay seen

Janji signature reflective logo on front hem + “watermark” reflectivity on back increase visibility in low light



All-summer comfort
Designed to dry quickly and not cling, this top is ready for everything from warm-to-hot conditions, humid training runs and endurance pursuits

Cling-resistant fit
Helio is made from a special 3-dimensional knit that raises it off the skin to prevent it from clinging when sweaty

Quick-dry to its core
Excellent moisture dispersal for sweat-wicking performance

Unhindered movement
Raglan sleeve design combined with flatlock seaming and minimal neckline prevent chafing for comfort through high-output movement

Stink-free bliss
HeiQ® Fresh odor control treatment keeps you smelling fresh through all-day adventures

Hang it up
An ultralight nylon hang loop is integrated into the back neck for easy hanging

Stay seen
Janji signature reflective logo on front chest + “watermark” reflectivity on back increase visibility in low light

materials + specs

Helio Tech
100% polyester with HeiQ® Fresh treatment

Garment made in Vietnam
72g / 2.5oz (W’s Small)

Fabric Callout


Customer Reviews

Based on 11 reviews
Fantastic lightweight shirt, a bit short in the torso

Love the Janji Helio Tech tee with it's lightweight feel while providing full t-shirt coverage. However, the torso is too short for my tastes. The shirt is cut longer in the front/back but shortens up at the sites. I don't have a lot of 'chest action' and even then the longer front/back hits just at my short waistband. If I raise my arms, my stomach shows. I'd prefer a bit more length in the shirt.

Good material, bad fit

I live in a very humid environment, so I was excited to see a shirt with a little more coverage but promising wicking ability. I ordered the Ocean color, which is very pretty and not at all sheer despite how light the material is. I do think the material is good for hot and humid weather. However, I really don't find myself reaching for this often because of how odd the sizing is. Like other reviewers have noted, the head hole is oddly small. I originally ordered a medium, my usual size (5' 4", 145#, 34D), but found it was just a little short and slightly too snug in the chest. I exchanged it for a large, but now I feel like it is way too baggy and I just don't like how it looks or how much extra fabric there is when I'm running. I will probably just end up using it for layering in cooler weather.

Anise Garrett

W's Helio Tech Tee

Sarah Perry
Love the color

I am obsessed with the Ocean color! This shirt is lightweight and soft. It is a little bit short on me - I would size up if you’re in between sizes. Overall I really like it!

Great Perfomance tee, less than ideal fit

I don't usually run in t-shirts but this one has quickly become a go-to because of how well it performs. It is light, airy, comfortable, and overall just pleasant to wear while running, but I'm not a big fan of the fit. The bottom of the shirt feels a wide and the curved hem feels a bit wonky and tends to flap around. But the head hole is a bit of a tight squeeze because the stitching isn't very elastic so I'm not sure a smaller size would be an option. I have also worn it just a few times and have noticed some pilling, so I'm not sold on the longevity of the garment either.


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