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Janji Collective

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Womens Fit Guide
biodegradable
run everywhere
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free 60 day exchanges
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Runterra Bio Boxy Tee

Runterra Bio Boxy Tee

COLOR >>  
W's Runterra Bio Boxy Tee
size >>
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THIS PRODUCT IS ONLY AVAILABLE TO JANJI COLLECTIVE MEMBERS

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THIS PRODUCT IS ONLY AVAILABLE TO JANJI COLLECTIVE MEMBERS

Join now to unlock access

JOIN JANJI COLLECTIVE
run everywhere guarantee
free shipping over $75
free 60 day exchanges
Justine is 5’7” // she wears size SAlexis is 5’9” // she wears size M Boxy, cropped fit, Size Chart

Run in it, sweat in it, live in it — then biodegrade it!

The first synthetic-blend running shirt that biodegrades like a 100% cotton tee, our Runterra Bio offers the enhanced moisture and odor control of specially-formulated 37.5® polyester with the comfort and versatility of cotton. This innovative fabric breaks down into organic compounds in as few as four years. Conventional polyester takes up to four hundred.

Don’t sweat it  this tee will only start to biodegrade in anaerobic (oxygen-poor) environments. It breaks down in the landfill, not in your closet.

Explore more

features

Biodegradable
Runterra Bio is powered by a specially formulated 37.5® polyester with enhanced biodegradation to break down into bio-based compounds in as few as 4 years in an oxygen-poor environment like a landfill

Premium cotton
Made from long staple, US-grown Supima® cotton for superior softness, strength + durability

Everyday looks
Easy to wear, slightly cropped silhouette hits above hip

Active comfort
Blended with 37.5® polyester, a special technology utilizing the natural benefits of microscopic volcanic ash to provide enhanced thermal, vapor + odor regulation to maintain body comfort during activity

Wear more, wash less
The natural odor resistance of cotton is boosted by the volcanic particles which "trap" odors so you can put this top through repeated wear

Modified raglan design
Shoulder seams are rolled back off the top of the shoulders for ergonomic comfort

Shrinkage is natural
This top is made from 70% natural fibers and is not pre-shrunk so some shrinkage may occur, up to half a size

materials + specs

Runterra
70% Supima® cotton, 30% 37.5® tech polyester

Garment made in Vietnam

Weight
103g / 2.9oz (W’s Small)"

sustainability

Why do biodegradable synthetics matter? 

While we design Janji gear to last and hold up to the demand of years of running, no tee or running shorts should last forever. With this in mind, we are researching innovative ways to improve end-of-life cycle management of our apparel. While we look into longer-term solutions and circular methods — recycle, repurpose and reuse programs — we also know that most textiles are thrown out and end up in landfills. Conventional synthetics, used heavily in active apparel for their high-performance functionality, do not biodegrade in typical landfill conditions. This includes synthetics made from recycled materials, and is why most plastic seemingly lasts forever.

We are seeking solutions to fix this as a performance apparel company that relies on synthetics, including the use of non-ecotoxic biodegradability within our textiles like this new Runterra Bio. This is the first step on a better path forward.



Runterra is made from premium, long-staple Supima® cotton which is 50% longer and up to 45% stronger than other cottons (and softer, too). The stronger the fiber, the more durable the garment, and therefore the more it can be worn. Supima® cotton is grown by a select few family farms that utilize advanced water and soil management techniques to reduce consumption and ensure the health of the land for optimal renewability.



Runterra fabric 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.

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Customer Reviews

Based on 11 reviews
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K
Katie
Wear it for: Running, Hiking
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Size Purchased: S

W's Runterra Bio Boxy Tee

M
Monica N.
Wear it for: Running
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: M
Size Purchased: M
Love the fit!

Love the fit but better worn on slightly colder condition than a tropical country

E
Elena S.
Wear it for: Running, Hiking, Everyday wear
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Size Purchased: S
Go-to summer running shirt!

I have a couple of these shirt now. I got the first one because it looked like a comfortable casual shirt but it ended up becoming one of my favorite shirts to run in the humid hot NYC summer. Why I love it: there's a bit more coverage on the sleeves for sun protection, the shirt itself is flowy and loose which is super comfortable, and the shirt dries quickly - and is miraculously non-smelly after a run! I've got a shorter torso so I'm a fan of this cut.

T
Theresa G.
Wear it for: Hiking, Camping, Everyday wear
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Cozy

I wore this in a recent paddle in backpacking trip. It was nice to have my shoulders covered. I also just find myself gravitating towards it because I like the fabric and fit! I am tempted to buy more!! Would recommend. It is a baggy/boxy cut, which works for me!

C
Christina R.
Wear it for: Everyday wear
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: S
Size Purchased: M

W's Runterra Bio Boxy Tee

J
JillJD
Wear it for: Running, Hiking, Everyday wear
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
Love this shirt

I really love the cut and fit of this shirt. Boxy yet flattering and comfortable. I love the cropped length too. Runs true to size.

A
Abigail L.
Wear it for: Running, Everyday wear
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: S
Size Purchased: S
Awesome Tee!

Great material and super comfy

G
Gosia
Wear it for: Running, Mountain Biking
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: S
Size Purchased: S
Amazing t-shirt

Perfect t-shirt for running and mountain biking.
Soft, comfortable my favorite!
Thank you

L
Liz
Wear it for: Everyday wear
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Size Purchased: S

W's Runterra Bio Boxy Tee

K
Kaitlin F.
Wear it for: Running, Camping, Everyday wear
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S
New Fave Crop

Really like this style. I have the purple with green text on it and it’s sooooo cute. Fabric is super soft.