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Swiftwick Zero Sustain Socks

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Item # SWF000A

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  • Black, XL ($7.19)
  • White, XL ($7.19)
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Item # SWF000A

Recycled comfort.

The 'Zero' in the Sustain Socks' title indicates the shortest socks in Swiftwick's line, and the 'Sustain' refers to the recycled nylon used to construct them. So, if you're after low-profile socks that were manufactured in the USA from post-industrial materials, the Zero Sustain Socks are your perfect match.

The socks were made from REPREVE, which is a post-industrial recycled nylon. In fact, as part of Swiftwick's line of socks that are created from this post-industrial recycled nylon, the Zeros were made to represent Swiftwick's carbon neutral philosophy and commitment to conserving and recycling. The socks were manufactured in Tennessee in Swiftwick's own factory, where its employees oversee every step of the process. Like the Olefin used in Swiftwick's synthetic collection, REPREVE wicks exceptionally well and is also hydrophobic, meaning that it will not absorb water. So, you'll stay dry and comfortable since the socks move with your feet and minimize (or eliminate) abrasion against your skin.

The Zero Sustain socks were created by a 200-needle machine process that yields a high density, seamless knit fabric. The cushioned footbed gives way to the thin-channeled upper -- both components playing a crucial role in providing overall comfort. The arch band provides support in the midfoot, and the Y-shaped heel contour assures that you won't experience any bunching or that overstretched feeling in the back.

Several knitting patterns in the footbed and cuff give the Sustain Socks a compressive nature that promotes blood flow in the feet. This then leads to improved vascular performance, resulting in reduced fatigue and a speedier recovery.

The Swiftwick Zero Sustain Socks are available in four sizes from Small to X-Large and in the colors Black and White.

Tech Specs

post-industrial recycled nylon
below ankle
Recommended Use:
road cycling
Manufacturer Warranty:

Size chart



Swiftwick Socks
US Men's 3-5.5 6-9.5 10-13 13.5-16
US Women's 5-7.5 8-10 10.5-14 14.5-16.5
Euro 35-38 39-42 43-46 47-49
How to Measure:
For best results, take measurements over your underwear.

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Here's what others have to say...


Happy They Fit!

  • Familiarity:I've used it several times
  • Fit:True to size

I wear a size 15 shoe, so I was shocked that these not only fit but are very comfortable without slipping. I'm definitely going to add more swiftwick socks to my drawer!


Great socks!!!

  • Familiarity:I've used it once or twice and have initial impressions
  • Fit:True to size

Wore these on my last bike ride, Salt to Saint, they felt great!!


Love these socks! Go figure

  • Familiarity:I've used it several times

Who ever think you'd love a pair of socks? But I love these. Just the right thickness. I don't like'm too thin. Feel great on and are super comfortable. I bought a couple of others, Pearl Izumi Attack Low and Craft Cool Shaftless, at the same time but these are much better than the PI's IMHO and worth the few extra $'s. Sizing guide was accurate for me. I'm a US9 and got a Medium.