FS4 Plantar Fasciitis Compression Socks
FS4 Plantar Fasciitis Compression Socks FS4_Black_main Untitled-1 OS1st Site FS4 Component 1.jpg Black no show back pairs web White no show back pairs web Grey no show back pairs web Mint Coral Blue Aqua FS4 Black FS4 White FS4 Grey size chart

FS4 Plantar Fasciitis Compression Socks

5.00 out of 5 based on 8 customer ratings
(8 customer reviews )

Our first ever Plantar Fasciitis sock featuring award winning, patented FS6® technology. Wearing the FS4TM PF socks during runs or sports activity will aid in preventing PF symptom onset and act as an overall foot health and performance aid. With precise targeted compression levels, the FS4TM features Compression Zone Technology® that is designed for proper foot support and injury prevention. Add to that, soft moisture-wicking fabric with anti-odor treatment and padding in the right places which creates a technical performance sock that strengthens the foot structure and prevents Plantar Fasciitis, as well as, overuse injuries.

Targeted Conditions:

  • Plantar Fasciitis
  • Foot Fatigue
  • Arch/Heel Pain

Performance Features:

  • Medical Grade Support
  • Y-Gore heel for anatomical shape
  • Patented Compression Zone Technology®
  • Seamless Construction
  • Moisture wicking, extra durable & soft nylong
  • Extra cushioning without the bulk
  • Anatomical left/right design for perfect fit
  • Anti-bacterial fabric

Comes with one (1) pair of socks per package.


Clear selection

FS4 Sports Plantar Fasciitis Sock by OS1st

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Socks with PurposeTM Member

Under Pressure? Give Your Best Performance

When you get your blood pumping, all the muscles in your body need their share.

Proper circulation is important for maintaining and rebuilding muscles after intense workouts. A sports foot compression sleeve will support your muscles while they work hard.

The Best Plantar Fasciitis Socks and Sports Compression Foot Sleeves

Our FS4 Plantar Fasciitis Socks provide medical grade orthopedic support. Patent pending Compression Zone Technology® relieves and prevents pain.  Get relief from past injuries, plantar fasciitis, chronic heel pain, swollen arthritic ankles and feet, or poor circulation.

4 Zones of Graduated Compression

Zone image

The OS1st® FS4 Plantar Fasciitis Sock has a comfortable, shaped fit.  The high performance design delivers four different zones of compression. This is a product that is comfortable and easy to wear daily. Don’t let bulky and uncomfortable splints keep you from your peak performance.

Defend Your Foot’s Health

Our sports foot compression sleeve reduces and prevents pain and injury from active lifestyles. Save yourself the hassle of putting your feet up and work on recovering!

Available in a sporty black, grey and white, the OS1st® FS4 Plantar Fasciitis Socks are a perfect fit for your active lifestyle!


Additional information

Weight 2 oz
Dimensions 4 x 7 x 1 in

1/4 Crew Black, 1/4 Crew White, 1/4 Crew Grey, No Show Black, No Show White, No Show Grey, No Show Aqua, No Show Blue, No Show Coral, No Show Mint


S, M, L, XL

Sizing Chart

How do you know what size? Just use the following chart:


Customers' review

Rated 5.00 out of 5 stars
8 reviews
4 stars 0 0 %
3 stars 0 0 %
2 stars 0 0 %
1 star 0 0 %

8 reviews for FS4 Plantar Fasciitis Compression Socks

  1. 5 out of 5

    They are terrific!Everything said about these socks is completely true! They are terrific!

    Was this review helpful to you? 0 of 0 people found this review helpful

  2. 5 out of 5

    Very high-quality socksVery high-quality socks. One of the best brands. I’m kind of a sock snob. My feet hurt a lot. I buy really good socks and shoes. Some people may not think socks make a difference. But they do.

    Was this review helpful to you? 0 of 0 people found this review helpful

  3. 5 out of 5

    Great Product!Living in a hot climate, the OS1st FS4 no show socks are great because of their low cut design, but still very supportive. I’ve used the sleeve design support for a few years now, but they require socks to be worn with them. Not so with the FS4! I own four pair and intend to buy a few more. Used in conjunction with an orthotic in my shoes, the support lasts throughout the day. Great product!

    Was this review helpful to you? 0 of 0 people found this review helpful

  4. 5 out of 5

    Super comfy!!I am currently wearing the FS4 Compression socks, the thickness and the roomy toes make them super comfy!! I cannot say enough about the quality of your products.

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  5. 5 out of 5

    Right amount of compressionThese compression socks are great! High quality material, breathable, and just the right amount of compression.

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  6. 5 out of 5

    These socks WORK!!!!These socks WORK!!!! Being born in the late 50's and with severe club feet, I had several surgeries on my feet and ankles. My feet do not hurt from running, but from all those surgeries, not anymore though! These socks WORK, period! No, I don't have PT but the compression works and keeps my feet and ankles feeling happy! Check them out!

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  7. 5 out of 5

    Fit just rightI’ve tried a couple of brands of plantar fasciitis socks and these fit the best. The compression isn’t too much, but they’re supportive when I’m running.

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  8. 5 out of 5

    BreathableThese socks are very comfortable and breath well. The compression is nice, it's not too much. I have really enjoyed the socks. - Christian

    Was this review helpful to you? 0 of 0 people found this review helpful

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