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Introducing the AC4 Active Comfort Sock - Crew, a light compression sock designed to provide unparalleled comfort and support for any activity, throughout the day. This sock blends the natural benefits of soft bamboo charcoal with advanced design features like cushioning in the heel and toe, and ultra-thin skin cooling panels for enhanced airflow. Ideal for those seeking a combination of performance, moisture management, and all-day comfort, the AC4 sock ensures your feet stay cool, dry, and comfortable, embodying the feeling of giving your feet a well-deserved hug.
The AC4 Active Comfort Sock - Crew stands out as a testament to thoughtful design and material innovation, offering a sophisticated solution for those seeking comfort and functionality in every step. It's more than just a sock; it's a comprehensive approach to foot comfort, designed to keep you active, comfortable, and dry throughout your day.
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
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.
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.
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.
A: All OS1st products are treated with silver which is a natural way to fight odor.
A: Yes, all OS1st products use a high-performance fabric that wicks moisture away from the skin for a dry experience.
A: We recommend you hand wash your socks and braces in warm water with non-bleach soap. Always air dry!
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.
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.
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.
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 info@myfootguy.com. 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 info@myfootguy.com.. Please see our full refund policy for details.












It is amazing how much difference buying a good pair of socks can make for your feet! I absolutely love wearing these socks. In fact, I no longer buy socks from anyone else. I can always count on Bryan at My Foot Guy to give me the right advice about anything having to do with my legs or feet! Thank you, Bryan! You are simply amazing ... and so are these socks!
These socks are of quality material and very comfortable. Gave adequate support and helped to alleviate walking discomfort during the day.
Best socks great service
Excellent comfort and swelling relief for ankles.
Once you wear a pair of socks from Bryan, other socks won’t cut it! I’ve put on another brand and before I can leave, I’ve changed to the OS1st! I’ve never worn a sock that fits and feels so good! Try them! I promise you’ll love them. And Bryan too! He goes above and beyond for his customers. Thank you, Bryan!
It is amazing how much difference buying a good pair of socks can make for your feet! I absolutely love wearing these socks. In fact, I no longer buy socks from anyone else. I can always count on Bryan at My Foot Guy to give me the right advice about anything having to do with my legs or feet! Thank you, Bryan! You are simply amazing ... and so are these socks!
These socks are of quality material and very comfortable. Gave adequate support and helped to alleviate walking discomfort during the day.
Best socks great service
Excellent comfort and swelling relief for ankles.
Once you wear a pair of socks from Bryan, other socks won’t cut it! I’ve put on another brand and before I can leave, I’ve changed to the OS1st! I’ve never worn a sock that fits and feels so good! Try them! I promise you’ll love them. And Bryan too! He goes above and beyond for his customers. Thank you, Bryan!
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!
Comfortable, cool, non-binding and attractive!
These socks are my new favorites for workouts & every day comfort. Material is not too hot which is a huge benefit in warmer weather.
These socks are really awesome and good for long distance running !!
I love the comfort and fit of the sock. Material is high quality.
Made my feet feel good all day
Excellent service
Love them! I have a pair for everyday when I play pickle ball. I will use no other brand.
Love them best socks
These socks are fantastic and amazing to use!
It’s very rare that you buy apparel that changes your life. This product has made being on my feet a much better experience. And they still give you support when you kick off your shoes at the end of the day!!!
Great experience with these socks. It has great cushion and keeps the foot dry
Socks are very comfortable and supportive for flat feet
Love the cushion feel on the bottoms, tight compression for arch support, and thin breathability on top.
Wearing them in combat boots and steel toed boots were pleasant, a little low on these specific ones of course but they kept my feet from soaking sweat, aching and generally being comfortable.
these socks are wonderful and really help my arch. Thanks Bryan for showing me these.
Very comfortable and practical.
Love the feel and comfort of these socks. Bought the bright pink and lime green. Love them. Foot tiredness gone. Will be purchasing more
Very cool and comfortable. Roomy around the toes.
Fit the feet perfectly and keep your feet cool & dry. Thank you for the review.
I bought these at a Pickleball tournament. What a wonderful difference! My feet feel fantastic!
These are awesome socks
Loved them! Great fit and comfortable too!
These moisture-wicking short socks stay in place during active play. No slippage. Great colors.
Very comfy and feel good on my feet
Love the comfort and support of these socks! Definitely going to buy a few additional pairs!!
I love my new pickleball socks. They are so comfortable and don’t slip when I play.
I was looking for new running socks and the PB4 pickle ball sock is great! I love the mid foot compression and ventilation on the top. I plan to get more from Bryan.
The best athletic sock I’ve ever used. Will buy again!
What I came in quickly and service was great thank you.
It is amazing how much difference buying a good pair of socks can make for your feet! I absolutely love wearing these socks. In fact, I no longer buy socks from anyone else. I can always count on Bryan at My Foot Guy to give me the right advice about anything having to do with my legs or feet! Thank you, Bryan! You are simply amazing ... and so are these socks!
These socks are of quality material and very comfortable. Gave adequate support and helped to alleviate walking discomfort during the day.
Best socks great service
Excellent comfort and swelling relief for ankles.
Once you wear a pair of socks from Bryan, other socks won’t cut it! I’ve put on another brand and before I can leave, I’ve changed to the OS1st! I’ve never worn a sock that fits and feels so good! Try them! I promise you’ll love them. And Bryan too! He goes above and beyond for his customers. Thank you, Bryan!
It is amazing how much difference buying a good pair of socks can make for your feet! I absolutely love wearing these socks. In fact, I no longer buy socks from anyone else. I can always count on Bryan at My Foot Guy to give me the right advice about anything having to do with my legs or feet! Thank you, Bryan! You are simply amazing ... and so are these socks!
These socks are of quality material and very comfortable. Gave adequate support and helped to alleviate walking discomfort during the day.
Best socks great service
Excellent comfort and swelling relief for ankles.
Once you wear a pair of socks from Bryan, other socks won’t cut it! I’ve put on another brand and before I can leave, I’ve changed to the OS1st! I’ve never worn a sock that fits and feels so good! Try them! I promise you’ll love them. And Bryan too! He goes above and beyond for his customers. Thank you, Bryan!
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!
Comfortable, cool, non-binding and attractive!
These socks are my new favorites for workouts & every day comfort. Material is not too hot which is a huge benefit in warmer weather.
These socks are really awesome and good for long distance running !!
I love the comfort and fit of the sock. Material is high quality.
Made my feet feel good all day
Excellent service
Love them! I have a pair for everyday when I play pickle ball. I will use no other brand.
Love them best socks
These socks are fantastic and amazing to use!
It’s very rare that you buy apparel that changes your life. This product has made being on my feet a much better experience. And they still give you support when you kick off your shoes at the end of the day!!!
Great experience with these socks. It has great cushion and keeps the foot dry
Socks are very comfortable and supportive for flat feet
Love the cushion feel on the bottoms, tight compression for arch support, and thin breathability on top.
Wearing them in combat boots and steel toed boots were pleasant, a little low on these specific ones of course but they kept my feet from soaking sweat, aching and generally being comfortable.
these socks are wonderful and really help my arch. Thanks Bryan for showing me these.
Very comfortable and practical.
Love the feel and comfort of these socks. Bought the bright pink and lime green. Love them. Foot tiredness gone. Will be purchasing more
Very cool and comfortable. Roomy around the toes.
Fit the feet perfectly and keep your feet cool & dry. Thank you for the review.
I bought these at a Pickleball tournament. What a wonderful difference! My feet feel fantastic!
These are awesome socks
Loved them! Great fit and comfortable too!
These moisture-wicking short socks stay in place during active play. No slippage. Great colors.
Very comfy and feel good on my feet
Love the comfort and support of these socks! Definitely going to buy a few additional pairs!!
I love my new pickleball socks. They are so comfortable and don’t slip when I play.
I was looking for new running socks and the PB4 pickle ball sock is great! I love the mid foot compression and ventilation on the top. I plan to get more from Bryan.
The best athletic sock I’ve ever used. Will buy again!
What I came in quickly and service was great thank you.
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