Therafirm Core-Spun Firm Knee High Unisex Support Socks 30-40 mmHg
Powerful Compression for Healthier, More Comfortable Legs
The Therafirm Core-Spun Firm Support Socks provide 30–40 mmHg graduated compression to help improve circulation, manage moderate to severe swelling, and support the treatment of advanced varicose veins and chronic venous insufficiency. Designed for individuals requiring medical-grade compression, these socks help relieve heavy, tired, and aching legs while promoting healthier blood flow throughout the day. Featuring soft, breathable materials, moisture-wicking comfort, and a secure fit, they deliver powerful therapeutic support for work, travel, recovery, and long-term compression therapy.
Powerful Medical-Grade Compression for Advanced Leg Health Support
The Therafirm Core-Spun Firm Support Socks are designed to provide strong therapeutic compression for individuals requiring advanced circulation support. Delivering 30–40 mmHg graduated compression, these knee-high socks help improve blood flow, reduce moderate to severe swelling, and support the management of chronic venous insufficiency, advanced varicose veins, and other venous conditions.
The graduated compression design applies the highest level of pressure at the ankle and gradually decreases up the leg to encourage healthy venous return. This therapeutic support helps reduce leg fatigue, heaviness, and discomfort while promoting improved circulation and long-term vascular health.
Designed for everyday wear, these socks provide reliable medical-grade compression while maintaining comfort throughout the day. The soft, breathable fabric helps regulate temperature and moisture, keeping feet and legs comfortable during work, travel, recovery, and daily activities.
Moisture-wicking fibers help keep skin dry, while the durable knit construction ensures long-lasting performance and consistent compression. A comfortable top band helps keep the socks securely in place without excessive binding or slipping.
Whether worn as part of a physician-recommended treatment plan or for ongoing circulation management, these firm support socks provide dependable therapeutic benefits and all-day comfort.
Key Features
- 30–40 mmHg graduated compression
- Helps improve circulation and venous return
- Assists in managing moderate to severe swelling and edema
- Supports treatment of chronic venous insufficiency
- Helps manage advanced varicose veins
- Relieves heavy, tired, and aching legs
- Soft, breathable fabric for all-day comfort
- Moisture-wicking fibers help keep skin dry
- Comfortable top band helps maintain a secure fit
- Durable knit construction for long-lasting wear
- Knee-high design provides effective lower-leg compression coverage
Ideal For
- Chronic venous insufficiency
- Advanced varicose veins
- Moderate to severe leg swelling
- Heavy, tired, and aching legs
- Post-vein treatment support
- Long-term compression therapy
- Travel and prolonged sitting or standing
- Everyday circulation management
The Therafirm Firm Support Socks combine powerful medical-grade compression, breathable comfort, and durable construction to help support healthy circulation, reduce swelling, and keep legs feeling comfortable and energized throughout the day.


Soft, Comfortable, Everyday Compression Socks
Core-Spun by Therafirm compression socks look and feel like soft, comfortable everyday socks with the added benefit of true gradient compression. Core-Spun compression features Core-Spun yarns, which are made by twisting fibers around an inner fiber, creating one yarn. This process is used to enhance functional properties of fabrics, especially stretch, comfort, and durability.
Core-Spun by Therafirm brand of healthy, true gradient everyday socks are now part of the Thuasne family of products. Core-Spun socks will always remain the quality, true gradient, American-made compression socks you know and trust.
Great Policies, Real Support
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