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Good Yarn

Every Skein Tells a Story Worth Telling

At String Theory, our collection wasn't built by following trends at trade shows. It was built around a mission: that the money you spend on your craft should make the world measurably better. Founded after the healing power of knitting revealed itself, String Theory exists because good yarn connects people — and we take that literally.

A Curated Collection of Natural Fiber Yarns

You'll find natural fiber yarns in every weight and form — soft merino for sweaters and shawls, sturdy wool for socks and mittens, breathable cotton for warm-weather knitting and crochet, luxurious alpaca and silk blends for heirloom pieces. We also carry recycled fiber yarns for knitters and crocheters who want beautiful work with the lightest footprint.

Whether you're casting on your first project or your fiftieth, every yarn in our collection has been chosen because it performs beautifully and because it's connected to something real.

Artisan Yarns with Actual Impact

When you buy from String Theory, the story doesn't stop at the skein. Our shelves carry hand-dyed yarn and small-batch yarn from makers whose work changes lives:

  • Handspun Hope cotton is handspun by single mothers in Ethiopia and organically dyed by women in Rwanda — a yarn that funds education for a new generation.
  • Manos del Uruguay has been employing women in rural Uruguayan cooperatives since 1968 — over fifty years of meaningful, fair-trade work.
  • Sister Ananse is a String Theory exclusive from local Chicago-area artist Naima Bond, whose fine arts background produces stunning, museum-worthy colorways.
  • Mitchell Wool Co. practices regenerative agriculture, helping restore the midwestern grasslands one fleece at a time.

These aren't marketing stories. They're the reason these yarns are on our shelves.

Yarn for Your Wellbeing — and the World's

Research shows that knitting and crochet are genuinely good for you — reducing stress, improving focus, and building community. We believe inner peace leads to world peace, and that the simplest way to pursue both is to pick up your needles. 

Find Your Next Favorite Yarn

Whether you're searching for the perfect hand-dyed yarn for a shawl, a fair trade wool for your next sweater, or a sustainably sourced yarn to add to your stash with a clear conscience — you're in the right place.

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A close-up of colorful variegated yarn balls and a matching knitted fabric sample displayed in a white tray on a wooden table.
Sale price$18.00
Ewetopia Silk & Mohair
Sister Ananse Road Trip Fingering
Sister Ananse Road Trip DK
open shipping box revealing 31 kraft paper envelopes with numbered stickers.

Box of Light 2026

31 surprises to countdown to the new year

Preorder now
RTY Route 66 Fingering*
Cumulus Stripes by Juniper Moon Farm | Cotton Worsted Yarn
29 Bridges Go To Sock – Hand-Dyed Speckled & Tonal Sock Yarn
Woman in a red jacket petting a lamb with a donkey standing nearby on a farm.
Legacy Worsted
Save 25%Three balls of yarn in blue, purple, and green with a Bella Tweed label on a white background.
Sale price$8.25 Regular price$11.00
LAMANA Premia – Kid Mohair & Silk Lace Yarn
Purple skein of yarn on a white background
Uneek Sock Kit Mini
Nokta
Sale price$25.00
(5.0)
Trinity Cashmere
Save 25%Winqu
Sale price$18.75 Regular price$25.00
Ewetopia Helix DK
Sale price$39.00
Save 25%Mojave
Sale price$11.25 Regular price$15.00
(4.5)
90 Varas
Sale price$18.00
Sold outBloom Mini Skein Set
Cashmere Dreams
Sale price$42.00
Save 25%Ito Shimo
Sale price$15.00 Regular price$20.00
BestsellerIto Sensai
Sale price$22.00
Neighborhood Fiber Co Organic Studio Worsted
Soft Donegal Chunky
Bloom
Sale price$38.00
(5.0)
Ewetopia Sustainawool
Ricorumi DK
Sale price$4.00
Deseos DK
Sale price$28.00
(5.0)
Paka Washi
Sale price$18.00
(5.0)
Chevron Baby Blanket KIT
Natural DyesMitchell DK — 18-Micron Rambouillet, Naturally Dyed
Natural DyesMitchell Fingering
Sale price$32.00
(4.5)
North Ave Primaries
Ito Kinu
Sale price$24.00
Lean Mean Machine
Sale price$39.00
(5.0)
New ColorsBeartooth High Twist
Sale price$30.00
(5.0)
Mota - String Theory Yarn Co
Sale price$19.00
(5.0)
Borocera Silk - String Theory Yarn Co
Sale price$30.00
(4.5)
Sold outTuscaloosa Hat KIT - String Theory Yarn Co
Rasta - String Theory Yarn Co
Sale price$31.00
(5.0)
Sold outOMFG Cowl KIT - String Theory Yarn Co
Sale price$128.00
(5.0)
Organic Studio Sock
Uneek Worsted
Sale price$36.00
(5.0)
Alpaca Heather 50g Dyed
Manos Alpaca Heather 100g undyed in Yarn - Sportweight | String Theory Yarn Co
Handspun Hope Angora blend
Rios - String Theory Yarn Co
Sale price$22.00
(4.8)
Fino Mini Kit in Yarn - Fingering | String Theory Yarn Co
Sale price$50.00
(5.0)
Natural DyesHandspun Hope Cotton
Sale price$35.00
(5.0)