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Protective gear and functional socks: 5% off for 1; 8% off for 2

The Kwun Tong store has moved to a new address: Unit B, 3/F, Tegg Centre, 135 Wai Yip Street, Kwun Tong. Sign up for membership and receive a $50 shopping credit

Protective gear and functional socks: 5% off for 1; 8% off for 2

The Kwun Tong store has moved to a new address: Unit B, 3/F, Tegg Centre, 135 Wai Yip Street, Kwun Tong. Sign up for membership and receive a $50 shopping credit

Protective gear and functional socks: 5% off for 1; 8% off for 2

OS1st FS4 Plantar Fasciitis Socks|Medical Grade Support

OS1st FS4 Plantar Fasciitis Socks|Medical Grade Support

OS1st® FS4™ Plantar Fasciitis Socks are made using top-tier precision knitting machines that accurately divide the socks into multiple compression zones.
They provide varying levels of compression and stability to different parts of the foot and joints, helping to relieve discomfort caused by overus

Free delivery for net purchase over $300 (Within Hong Kong) on order

Free delivery for net purchase over $300 (Within Macau) on order

Special offers on select brands Orthosis and functional socks 2026 on selected categories

HK$290.00
HK$255.00
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Description
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Description

OS1st FS4 Plantar Fasciitis Socks

Through professional zoned compression technology, it provides 360-degree full coverage and reinforcement for the arch, while giving stable protection to the ankle. It provides shock absorption and cushioning functions, reducing foot discomfort caused during activities. Excellent breathability keeps feet comfortable and fresh. The symmetrical left and right foot design conforms to ergonomics, allowing both feet to get a better fit and support.
Wide Toe Box

Wide Toe Box

Natural toe-spreading space

360 Protection

360° Protection

Full wrap protection

Breathable Yarn

Breathable Yarn

Stays cool and dry

Silver Ion

Silver Ion Tech

Anti-odor & Antimicrobial

Ergonomic Design

Ergonomic Fit

Left/Right specific design

Moisture Wicking

Moisture Wicking

Dry and comfortable

Seamless

Seamless Design

No irritation or friction

CZT Technology

CZT® Technology

Zoned Compression

Click to view DS6 Night Time PF Treatment

Debunking Function Sock Myths

OS1st Infographic

Product Highlights

  • Medical grade support for the arch, enhancing foot structural stability
  • Patented Zoned Compression Technology
  • Y-Gore heel cut for perfect fit
  • Seamless toe design, soft and non-chafing
  • Increases foot stability
  • Moisture-wicking material

Compression Zone Technology® (CZT®)

Compression Zone Technology is a patented innovation designed for sports sleeves and professional compression socks. By using top-tier high-precision knitting machines, it seamlessly transitions from moderate to high-intensity compression zones in a single product, providing exclusive support to key areas. This not only relieves specific discomfort but also brings optimized sports performance and all-day comfort.

The OS1st® patented CZT® technology utilizes premium knitting machines to precisely divide the FS4® Plantar Fasciitis Socks into 4 pressure zones, providing specific pressure values for the foot and various joint parts. Through progressive compression and enhanced joint stability, it effectively relieves foot discomfort caused by daily activities.

Textile Engineering – Extensive research and medical testing led to our patented technology proven to treat Plantar Fasciitis.

Advanced Equipment – Each product is made by the world's most advanced high-precision knitting machines.

Moisture Transfer System – Top-tier microfiber yarns with built-in moisture wicking to keep feet dry.

Lycra® Energize Fiber – Patented fiber provides a custom-like fit and flexibility.

Zero Burden – Premium materials combined with precise compression zones create a thin, lightweight design that is durable yet soft.


Product Specifications

Colors: Black, White
Size: S / M / L / XL
Material: 11% LYCRA® Spandex, 89% Nylon
Origin: USA Brand, Made in Taiwan

Size Selection:
Select based on your regular shoe size (refer to diagram below):
S - Men US 3 - 5.5 / Women US 4 - 6.5
M - Men US 6 - 9.5 / Women US 7 - 10.5
L - Men US 10 - 13 / Women US 11-Plus
XL - Men US 13.5 - 15

Size Chart

Instructions & Washing

Wear the product correctly avoiding folds; refer to the package for positioning. It is recommended to wear for 1-2 hours initially, then gradually increase time. Do not exceed 8 hours per use. If allergy, eczema, or pain occurs, stop use and consult a doctor. Diabetics should consult a doctor before use.

Washing: Hand wash at room temperature with neutral soap. Air dry naturally; avoid direct sunlight. Do not bleach, iron, or dry clean.

Customer Reviews

★★★★★

"Life Changing!" - I suffered from morning heel pain for months. After 2 weeks of wearing FS4 during work, the pain is 90% gone. Best investment for my feet.

— Verified Buyer, Hong Kong
★★★★★

"Perfect for Marathon Training" - The arch support is unmatched. Doesn't feel bulky in my running shoes. Highly recommend for active recovery.

— Sport Enthusiast

Frequently Asked Questions

Q: Can I wear FS4 socks to sleep?

A: The FS4 is designed for active daytime use. For nighttime recovery, we recommend the OS1st DS6 Night Sock which specifically targets plantar fascia stretching during rest.

Q: How many pairs are in a pack?

A: Each pack contains 1 pair (one for the left foot and one for the right foot).

Q: Are these socks suitable for Flat Feet?

A: Yes! The medical-grade arch compression provides excellent support for individuals with flat feet, reducing fatigue and over-pronation.

Shipping & Payment

Delivery Options

  • Hong Kong Local Courier
  • Pick Up At Store
  • 啟德SOGO Alohalife旗艦店自取 [到訪前請先確認庫存]
  • 銅鑼灣SOGO Alohalife自取 [到訪前請先確認庫存]
  • Courier in Macau
  • Shipping to Taiwan (⚠️ Shipping Fee NOT Included) (4-10 Working Days ⚠️Please read before purchase)

Payment Options

  • Credit Card
  • Credit Card（Visa/ MasterCard/ AMEX）
  • Payme (Alohalifehk)
  • FPS
  • Bank Transfer / ATM
  • PayPal & Credit Card
  • Alipay (HK)
  • WeChat Pay
Customer Reviews
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