Fabrics - Luxurious & Down to Earth

SteelCore’s Exclusive Organic Cotton Blend

We wanted to create a fabric that is ideal for you and the planet, so we worked with a textile chemist to create our special recipe of organic ringspun cotton and spandex, creating a superior quality organic cotton that works equally well for active and lifestyle clothing.  SteelCore pays attention to the ‘not so small’ details like opacity, construction and fit. Our organic blend comes in three weights and all are 4-way stretch. We knit our fabric in mills located in the USA (yes they do still exist and we want to keep them here) and of course all our design and production also happens here.

  • 92% Organic cotton -8% Spandex  Lightweight  (tops and lounge legging)
  • 90% Organic Cotton – 10% Spandex  Midweight   (capris)
  • 88% Organic Cotton – 12% Spandex  Heavyweight (yoga pants)
  • GOTS Certified Organic Cotton  Knit in the USA
  • Machine wash cool; tumble dry low
  • See more about the creation of our fabrics and how best to care for them in our BLOG

Micro Modal

Modal is a second generation regenerated cellulosic fiber and a variation of rayon. Lenzing Modal® is made from sustainably harvested beech trees in PEFC (Programme for the Endorsement of Forest Certification schemes) certified European forests. PEFC is the world’s largest forest certification organization. Modal fibers with a high wet modulus were originally developed in Japan in 1951. Lenzing started selling modal fibers in 1964. In 1977, Lenzing started using an environmentally friendly bleaching method for pulp for their cellulosic fibers.

  • Soft and cool; eco-friendly
  • Holds shape well; drapes easily
  • Knit in the mills of the U.S.A
  • Machine wash cool, line dry, cool iron if necessary                 

Rayon from Bamboo

Rayon is a regenerated cellulose fiber, meaning that a natural raw material is converted through a chemical process into a fiber that falls into a category between naturals and synthetics. The source of cellulose can be wood, paper, cotton fiber or, in this case, bamboo ... a natural plant fiber that regenerates faster than the other plant fibers listed.
  • 67% Rayon from Bamboo 29% Cotton 4% Spandex
  • Lightweight, with a soft hand; eco-friendly
  • Breezy, cool and moisture-absorbent
  • Imported from Canada
  • Machine wash cool, line dry, cool iron if necessary


When manufacturers (think the premier active wear line with an upsidedown U logo) change fabrics or finish their run on bolts of fabric, remaining quantities of fabric are eventually discarded to local landfills.  SteelCore, being a small company concerned about environmental issues, decided we would upcycle those leftover fabrics, before they were sent for discard.  This practice continues our commitment to eco friendly manufacturing, and allows us to produce limited runs of special items.  It's a win-win idea!  Available in assorted fiber compositions and combinations.

  • Tried-and-true for active wear comfort and reliability
  • Opaque blacks (we didn’t pick up the faulty fabric)
  • Machine wash cool; line dry 

Performance Fabrics


Supplex is a sturdy and absorbent fabric with 4-way stretch for firm support. This fabric works hard and stays fresh. Breathable and cottony-soft comfort with the benefits of advanced technology that makes it shrink and fade resistant. Gone are the days of feeling like a sausage in your workout clothing.
88% Supplex® + 12% Dupont Lycra®

  • 4-way stretch & rebound
  • Wicking qualities keep it fresh
  • Shrink and Fade resistant
  • Machine wash cool; tumble dry low

Brushed Supplex®

Supplex/Lycra blend, with a brushed flannel feel on the underside of the fabric. Warm and sturdy, firm support.    

  •  88% Supplex + 12% Lycra
  • Warm, brushed 'fleecy' feel on the skin side
  • Deep, crisp black with great color retention 


    Warp knit technical fabric imported from Italy. The perfect fabric for the creation of elegant and high performance apparel. 

    • 88% Polyamide 12% Elastane
    • Light as a breeze; silky hand and lightly brushed hand on the skin side
    • Machine wash cool; fast drying drip or tumble low

    SpaceDye Performance

    This is it. The last and greatest legging fabric you will ever own. A uniquely textured performance fabric with an exceptionally soft hand.  A heathered look in secure full coverage legging weight. Amazing hold, stretch and rebound that maintains color and shape throughout every wash with zero pilling.                                                                                                                                     

    • 87% Polyester 13% Spandex
    • 370 gms
    • 4-way stretch                               
    • Incredibly Soft hand
    • Moisture wicking
    • Machine wash cool; tumble dry low  


    Airy and light but holds its shape comfortably whether as a bra lining, inset panel, or flowing skirt.  Easy-care and long-wearing beauty.

    • 89% Nylon  11% Spandex
    • Great stretch and rebound
    • Able to be cut without fraying
    • Hand wash cool; line dry

    Baby Mesh

    • SUPER soft and delicate accent fabric

      Soft Motion Micro Fiber

      Cottony soft - softer and more malleable than supplex, this sturdy fabric has good hold, stretch quality, and color retention wash after wash without shrinking or pilling. 
      90% Microfiber + 10% Spandex

      • Wicking keeps you dry & cool
      • Supportive hold; excellent stretch & rebound
      • Wide assortment of vibrant colors
      • Machine wash cool; tumble dry low                                                    


      Diamond is an interesting contrast to spike your active or casual clothing fashions. Imported from Portugal and dyed to match our anything in our black or midnight color ways.

      • 93% Polyester 7% Elastane
      • Fashion texture designed fabric
      • Extra Firm hold, good stretch and support
      • Machine wash cool; tumble dry low

      Fashion Fabrics

      Luxury Suede

      A suede luxury look and feel that's WASHABLE!

      Perfect for active or street wear providing style AND comfort.  Looks like real butter suede!    

      • 95% Polyester   5% Spandex
      • Gentle stretch comfort; good shape retention
      • Warm, soft hand
      • Machine wash cool; tumble dry low                                       


      Elegant, soft touch for a classic beauty finish. Easy-care, long-lasting beauty. Burn- out, Ribbed, Crushed and Panne

      • 90% Polyester + 10% Spandex
      • Holds color beautifully
      • Soft, elegant look & feel
      • Machine wash cool; tumble dry low

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