OS1st FS4 Plantar Fasciitis Socks - No Show
The first-ever Plantar Fasciitis sock that strengthens the foot structure and prevents Plantar Fasciitis symptom onset as well as overuse injuries. With precise targeted compression levels and cushioning, the FS4 Plantar Fasciitis sock features Compression Zone Technology® that is designed for proper foot support.
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
- Extra cushioning without the bulk
- Anatomical left/right design for perfect fit
- Anti-bacterial fabric
| Size | Average Shoe Size | |||
| S | US: M 3-5.5 | US: W 4-6.5 | UK: 2-4.5 | EU: 34-37 |
| M | US: M 6-9.5 | US: W 7-10.5 | UK: 4.5-8.5 | EU: 37.5-43 |
| L | US: M 10-13 | US: W 11+ | UK: 9-12 | EU: 43-47 |
| XL | US: M 13.5+ | UK: 12.5+ | EU: 48+ | |
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Tulis FAQ's
1. What are Tuli’s Heavy Duty Heel Cups?
Tuli’s Heel Cups are shock-absorbing inserts designed to sit under your heel inside your shoes. The Heavy Duty version is thicker and provides extra cushioning for high-impact activity or long days on your feet.
2. What shoes do they fit into?
They fit most lace-up shoes including runners, school shoes, work shoes and everyday sneakers. They may feel too snug in very tight dress shoes.
What’s the difference between Classic and Heavy Duty?
Classic = standard thickness for everyday shoes.
Heavy Duty = roughly twice as thick, ideal for sport, high-impact activity and roomier footwear.
How long do they last?
They’re durable, reusable and designed for daily wear. Most people move them between different pairs of shoes.
