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AC4 Active Comfort Sock - Crew

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Color – Black
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Product Details

The Active Comfort light compression sock is a comfortable, all day sock for any activity. It features soft bamboo charcoal, cushion in the heel and toe, ultra-thin skin cooling panels for air flow. This sock helps to wick the moisture and breathe so your feet stay cool & dry. Give your feet a hug today. 

For the best fit, it is important to use the size chart before ordering.

Benefits & Features

Included in all OS1st Socks:
•Micro-nylon treated with silver-ion technology to keep dry and prevent odor
•Seamless construction and left/right design for 360-degree blister protection
•Y-Gore heel to prevent the sock from slipping down into your shoe

Frequently Ask Questions
Q: What are OS1st products made of?

 A: OS1st uses top-quality, high-performance, moisture-wicking materials with a silver-ion anti-microbial treatment. Materials include Lycra Spandex, micro-nylon, nano-bamboo charcoal, and Merino Wool treated with silver-ion for moisture-wicking and anti-microbial. The gel grip on the compression bracing sleeves is hypo-allergenic silicon. Please see product descriptions for more information.

 Q: How do I figure out my size?

A: All our products have a corresponding size chart that will help you choose the best size for you. We recommend using each individual size chart for each product. If you are close to the next size in SOCKS, size down and if you are in between sizes for COMPRESSION, size up.

Q: What’s different about our compression?  

A: Unlike some compression products, all OS1st products are 100% medical grade compression. We apply our compression with our patented Compression Zone Technology ® which targets specific joints and muscles so you can be active and pain-free.

Q: How do you fight odor? 

A: All OS1st products are treated with silver which is a natural way to fight odor.

Q: Do OS1st socks and braces wick moisture? 

A: Yes, all OS1st products use a high-performance fabric that wicks moisture away from the skin for a dry experience. 

Q: How do I wash my OS1st? 

A: We recommend you hand wash your socks and braces in warm water with non-bleach soap. Always air dry!

Q: What size am I, since someone falls in two different size locations on the chart?

 A: SOCKS - We recommend sizing down in socks if you are close to the next size. COMPRESSION - We recommend sizing up if you are in between sizes for compression.

Q: How long can I wear them? 

A: It all depends on how often you wear your product and what you do in them! A good rule of thumb is to check in at 6 months and make sure the compression is still working as it did when you bought it. We have a 100% satisfaction guarantee, so feel free to reach out to us at any point in the product life cycle.

Q: How much compression is in the product?

A: Our products use Compression Zone Technology® which uses varied levels of compression to target specific areas affecting the injury/pain. See individual product listings for compression range information.

30 days Return Policy

My Foot Guy believes in a 100% satisfaction guarantee, which means we will replace mis-shipments, defective products, and size exchanges for free, no questions asked! If you have questions or you need to replace your product, please email We are also committed to your complete satisfaction. If you are not satisfied with your purchase at any time, you may return it for a full refund. Please email Please see our full refund policy for details.

AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew
AC4 Active Comfort Sock - Crew

Customer Reviews

Based on 36 reviews
Sebrina Lassiter

Your feet feel like you are walking on clouds.

Thanks so much for the review. Yes, the active comfort provides great cushion and compression to support the arch. They're like giving your feet a hug!

Debra Maddox
Love these socks!

Comfortable, cool, non-binding and attractive!

Barbara Dance
Comfy Feet

These socks are my new favorites for workouts & every day comfort. Material is not too hot which is a huge benefit in warmer weather.

Randy Shelton
Comfort socks

These socks are really awesome and good for long distance running !!

Vi Truong
Love love

I love the comfort and fit of the sock. Material is high quality.