F4 Tech (3 pair pack)

$25.00

Size

Small (shoe size 4-6)

Medium (shoe size 7-9)

Large (shoe size 9-11)

X-Large (shoe size 12-14)

Color

White/Gun

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Designed to meet the demands of race-day athletes, the F4 utilizes to provide compressed venting and moisture wicking in the most extreme conditions. Made with Sorbtek®, this sock channels moisture away from the foot, keeping it cool and dry. Anatomical left-right foot construction allows for precise fit, while a unique cushioning system provides comfort in specific pressure areas. Achilles protection reduces blistering on the back of the foot, and a front tab protects against shoe friction. The F4 is only available in no-show length.

83% Nylon, 16% Sorbetk Polyester, 1% Spandex

Customer Reviews

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Cynthia T.

The fit is very comfortable in these socks. My feet fit in the large and I like that the socks are marked left and right. Pleased with purchase.

David P.

Fit is perfect, no sweat and great support

Jesse M.

I discovered fitsoks about 10 years ago and haven't bought any other socks since. These are my go-to workout/running socks. I also love the wool ones for colder weather and even with boots. The price is great considering the quality and the warranty. I recommend them to all my running friends.

mary j.

Love these. Used this brand for half marathon, and they were wonderful...no blisters so Yay!

Preacher F.

Been wearing the F4 tech for more than two years to golf in. Best socks EVER! Stay up for entire round. Got our nurse Daughter, and waitress Daughter 6 pair each for Christmas. USA USA Preacher

Tanya H.

Love these. However I ordered a pack of a different style, and after a week was informed they weren't available. A better system is needed so that if you're out of stock it won't l et you order.

John A.

Makes your feet feel great...will be getting more in the future

Joan G.

Great Sox! Very comfortable & the best I’ve tried!! Thanx

Nina N.

Best sock!!! Can’t feel the seam and they don’t clog up your shoe.

Rafael M.

Good quality

Laurie R.

Wi bought my husband these sox in 2015 when he ran his first marathon. My husband still 7 years later wears the same pair of sox. The pair I just purchased are for my son who will participate in his first triathlon. I hope 7 years later these sox are of the same quality. Thank you. Laurie Rivard

Frances P.

I bought these for my husband and he really likes them. I also bought a different style from Fitsok but he thought they were too thin so I will give those away and not buy them again. They also have a thicker sock and he likes them also. I will continue to buy from Fitsok.

Julie W.

Have routinely replaced old Fitsox. Love em!

Jamie S.

Soft comfortable love them feet stay dry while hiking.

Lita T.

Best fitting socks I have ever had

Wes R.

These are nice but a bit too thin and not enough cushion for me to be my primary running sock.

Troy M.

Great socks! I wear size 11.5 shoe and bought the size XL socks. Fit is pretty snug, so I can’t imagine trying to wear the size L socks. Good cushioning and moisture wicking, feet stay comfy and cool in my Asics runners!

MADE IN THE USA + LIFETIME GUARANTEE

Fitsoks on runners Standing on a mountain

2 Brothers Both Runners

We make these runderful socks in our family owned sock factory located in the foothills of North Carolina. We bring 3 generations of innovation, quality and passion into every pair.

Made for Movement

Our socks are engineered for people on the move. We blend the best fibers & innovated construction techniques to optimize performance.