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Runterra Bio Tee

Runterra Bio Tee

Odor-resistant + thermoregulating top for daily active wear

COLOR >>  
M's Runterra Bio Tee
size >>

 

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William is 6'1" and wears size M Regular 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 new, innovative fabric breaks down into organic compounds in under four years. Conventional polyester takes 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 under 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, casual cut with a straight hemline

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 / 3.6oz (M’s Medium)"

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 27 reviews
85%
(23)
0%
(0)
11%
(3)
4%
(1)
0%
(0)
J
John M.
Wear it for: Running, Climbing, Everyday wear
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: M
Size Purchased: M
Solid

Comfy and fits well. Regulates temperature we'll. Nice.

B
Brody
Wear it for: Running, Everyday wear
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: M
Size Purchased: M
Wears like a T-Shirt, works out like running shirt

Has a lightweight material, very comfy I like it because it feels more like your classic cotton shirts and less the synthetic blends. Though it’s great for running and has no odor issues after some hot muggy runs.

Will be getting more

I
Indyrunner
Wear it for: Running
Product Fit: Spot-on
Height: 5'1" to 5'3"
Usual Size: S
Size Purchased: S

Great running shirt!

N
Nate P.
Wear it for: Running, Hiking, Climbing
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: M
Size Purchased: M
Love this shirt

It's light weight, it fits really well, it looks great. On my recovery run days I wear it to work and it looks good under a flannel, then I just have to change into shorts to run. I want 4 more in different colors.

M
Matthew M.
Wear it for: Running, Hiking
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: L
Size Purchased: L
Great Shirt

Great shirt. Comfortable, looser fit that does not hang down too far which is great for the 5’8” crowd. Size large allows for a roomy but not baggy fit after it is washed and dried (on low).

As Janji notes: this shirt shrinks a bit so factor that in.

R
Ross H.
Wear it for: Running
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Size Purchased: S
Great shirt!

This instantly became my favorite shirt for running in warm to hot weather. I'd like to have more color options, but the shirt itself is fantastic.

C
Cam N.
Wear it for: Running, Cycling
Product Fit: Spot-on
Height: 5'7" to 5'9"
Usual Size: L
Size Purchased: L

M's Runterra Bio Tee

M
Morgan B.
Wear it for: Running
Product Fit: Spot-on
Height: 5'10" to 6'0"
Usual Size: M
Size Purchased: M

M's Runterra Bio Tee

A
Adam A.
Wear it for: Running
Product Fit: Spot-on
Height: 5'4" to 5'6"
Usual Size: S
Size Purchased: S
Soft and Comfortable

Great for running or working out it.

S
Sean J.
Wear it for: Running
Product Fit: Runs large
Height: 6'0" to 6'2"
Usual Size: L
Size Purchased: L

M's Runterra Bio Tee