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 16 customer ratings
(16 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.


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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 × 7 × 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
16 reviews
4 stars 0 0 %
3 stars 0 0 %
2 stars 0 0 %
1 star 0 0 %

16 reviews for FS4 Plantar Fasciitis Compression Socks

  1. 5 out of 5

    OS1st socks are amazing.OS1st socks are amazing. As a triathlete and Ultrarunner, I am dedicated to particular brands. I was recently given a pair of OS1st socks (WP4) to try and and hands-down they were the most comfortable socks I've ever worn. Since that first try, I have tried and worn other models, like the FS6 and FS6+ Sports Compression foot sleeve and leg sleeve (I had an achilles repair 3 years ago) and all of them are great, but my favorite has to be the crew socks made with bamboo. I am a huge fan and cant wait to see what they come out with next. Thanks OS1st for a solid product.

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  2. 5 out of 5

    ImpressedI have to say the FS4+ socks and the FS4 socks are my absolute favorite. I wear them both all the time. I usually never wear compression socks on a run, always after, but I just ran a 20 miler in the compression socks. I am so impressed with the comfort and compression of the socks. Truly top of the line quality and comfort!!!!

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  3. 5 out of 5

    Amazed at the immediately reliefI was given a pair of your Plantar Fasciitis socks at the OR show in Denver last month. I was amazed at how I could immediately feel support and relief provided by the socks. I continued to wear the socks for the next 2 weeks, I must tell you that my foot feels completely healed now. I want to thank you for making such a great product and for helping me get over my Plantar Fasciitis which I thought would never go away.

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  4. 5 out of 5

    These are my new favorite sock! The support on the arch is excellent AND the sock does not compress the toes!! This is a game changer in my sock inventory and will be ordering more! Cannot say enough positive about these socks.

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  5. 5 out of 5

    I just ordered 4 more pairs after wearing the pair that I puchased last week. The pressure is perfect and not squeezing like I thought it would be. It does not leave indentions in my foot. I like them so much that I started wearing them to bed for support. My feet and plantar fasciitis feel better and I hope this will help the PF go away

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  6. 5 out of 5

    I started wearing these socks, without any plantar issues because they were in my sock drawer, and why not give them a shot? They quickly became my favorite socks, because they don't have any signs of wear after months of using them, the moisture wicking fabric actually works, and they don't shift or move in my shoes no matter how many miles I am running that day.

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  7. 5 out of 5

    I'm a believer!My fiancée and I met you at the New York City Marathon expo on Thursday night. You sold me two pairs of Plantar Fascitis socks, the FS4 No Show and the FS4+, and I wanted to let you know that they truly made a difference. The marathon was brutal for me this year, but I don't think I would have been able to get through it without the short socks. Additionally, I flew from NYC to Seattle for work that Monday morning and the compression socks were life savers. The support those socks provide is incredible. Thanks for sharing the insights and convincing me to make the purchase. I'm a believer!

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  8. 5 out of 5

    Help with swellingThese fit well and helped with swelling. Thankfully surprised.

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  9. 5 out of 5

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

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  10. 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.

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