Koi Fish - Full Length Triathlon Leggings

$ 94.50 $ 99.00
Pay in full or in 4 interest-free installments of $ 23.62 with  Learn More

Size Guide
Ethically Made in USA, Muscle Control (Compression), Ultra Quick Dry + Breathable, UV Protection 50+ and Sunscreen Resistant

◇ Made with Italian Compression Fabric and run slim. For a more casual fit, we recommend going up a size.
◇ Flat-Lock Seams and a Unisex Long-Panel Gusset.
◇ Original Artwork by our female founder, Chriztina Marie.
◇ Perfect for high endurance activities and water sports (running, cross-fit, weight training, cycling, surfing, etc.)

Be sure to check our Comparison Guide to Learn More:

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zoomed in image of our Italian triathlon fabric with butterflies print
Italian Performance


Made with phenomenal Italian Performance (Compression) Fabric that was originally developed for Olympic athletes. Provides Muscle Support, is Ultra Quick-Dry, Breathable, and offers UV 50+ Sun Protection. Printed with a vibrant & eco-friendly digital dye-sublimation process. Perfect for high endurance activities and water sports: crossfit, running, weight training, cycling, surfing, etc. (70% Polyester, 30% Elastane)

Girl doing advanced compass yoga pose while wearing our full length triathlon leggings with moon print
Full Length Triathlon


Runs slim (compression fabric). Our Full Length Triatholon Leggings offers a Mid-Rise at approx 8.5" with a two-piece contoured waistband. Sewn with flat-lock seams at the front/back rise and inseam that eliminates bulkiness and aids against chafing. All of our Full Length Triathlon leggings have unisex long panel gusset and the full length can accomodate 30-35" inseam.

Photo of our female founder, Chriztina Marie, hand illustrating our Sugar Skull artwork.


Our leggings feature original artwork by our female founder, Chriztina Marie. It all starts with a spark of inspiration and pencil sketch that is scanned into the computer and perfected within photoshop. One design can often take up to 80 hours to complete from start-to-finish: it's all in the details.

Photo of our small design studio with sewing machines and our industrial heat press (her name is Jozie)
Where They're Made


Well, not really a factory ... more like a happy little werkshop ;) All of our Full Length Triathlon Leggings are made in-house in our small design studio in Monrovia, California. USA! We methodically cut, print and sew every single pair we ship by hand with love. Thank you for keeping our small business alive, xo.

Designed for a


All of our full length triathlon leggings feature a long panel gusset that is not only flattering for both men and women, but it also improves mobility.

Customer Reviews

Based on 12 reviews
Koi Fish Triathlon

I wore these to a Pure Barre class recently. The large size fit well and the leggings stayed in place.

The colors really are more beautiful in person. Some of the hues and tones have an antique look.

Stephen S.
Koi Fish Full length Triathlon Leggings

I wore these to a Pure Barre class.

Loved the fit and feel. Very functional for the Pure Barre class.

The color in person was better than online. Very rich almost antique colors.

Kelly H.
So soft and comfy! Like a second skin!


So cool!

I love my Koi Fish leggings! The print is so beautiful and vibrant! They don’t go unnoticed, I’v got many compliments :). I fit right in the measurements for Medium and they are true to size even though they will feel very snug at first. They will adjust to your body after a few wears.

Yayy compliments!!! We're so happy you and everyone else loves them! Thanks for the awesome review! <3 Brian

Alistair H.
Top quality

These really do wear-to-fit. I feel that I’m close to being a size Small but the Medium is fine. I’ll try the Small and see if wearing them makes a better fit.

The material is awesome, though. No pilling after months of regular use and washings.

Thanks for the great review! We're so glad you love them! <3 Brian

Christine K.
Different but oh so beautiful

Usually I wear black, white, grey, sometimes teal, fuchsia in a really rare moment. So I don't know what happened, but ERWS made me wear colorful, fun prints too. The quality and design are perfect, they fit like a glove and I love working out in them or simply put, just wearing WS leggins all day long.

Thanks for the sweet review, Christine! We're so happy that you decided to give our prints a go and that you're enjoying them so much! We hope all of your Werkshop leggings continue to delight you for a long time to come! xoxo, JJ