Semibold Smiley Face Performance Crew Socks

Lightweight Coolmax® crew socks engineered for breathable comfort and compression during workouts and training.
$144.00
Size
15% Off First Order · Code: FIRST15OFF
True to size. If you're between sizes, size up.
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Comfort guarantee
BEST FOR
Training & Gym
Running
CUSHION
Medium Cushion Medium Cushion
FIT
FEEL
WHY YOU’LL LOVE THIS

A performance black sock that’s far from boring. Featuring our signature 3-in-1 arch support, this sock "hugs" your foot to prevent slippage while the Coolmax® mesh keeps things airy. A subtle smiley face on the back and a pop of blue on the arch break the monotony of plain gear, reminding you to enjoy every step of your journey.
PRODUCT DETAILS

Material Benefits

  • Rapid Sweat Transfer: Keeps feet dry
  • Breathable Build: Supports airflow
  • Friction Defense: Prevents discomfort
  • Cooling Response: Releases heat
  • Strong Durability: Keeps performance

Key Features

Wing Cushion™
Reduces friction during quick direction changes
Tri-Arch System™
Enhances support, cushioning, and stability
CoolVent™
Keeps feet cool and dry during movement
Comfort Compression™
Improves circulation and reduces fatigue
Natural Toe Fit
Designed to match your natural foot shape
Seamless Toe
Minimizes friction for a smoother feel
Smart Targeted Cushion™
Absorbs impact in high-pressure areas
Stay-Up Cuff
Keeps socks secure without slipping
Midfoot Hug™
Holds your foot in place for stability
Toe Airflow™
Reduces moisture between toes
Achilles Pillow™
Prevents rubbing at the heel collar
Arch Spine™
Reinforces natural arch support
Semi Smile™
A playful touch that celebrates every step
MATERIALS & CARE

65% CoolMax®, 32% Nylon, 3% Lycra

Machine wash cold
Turn inside out
Do not dry clean
Do not iron
Tumble dry low
No bleach
SHIPPING & RETURNS

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ADULT SIZING

True to size. If you're between sizes, size up.

SOCK SIZE
S/M
M/L
ONE SIZE
US
W5–9 / M3–7
W9½–12½ / M7½–13
W5–12½ / M3–13
EU
36-40
41-47
36-47
UK
3-7
8-12
3-12
FR
36-38
38-40
36-40
IT
40-42
42-44
40-44
JP
7-9
9-11
7-11
KR
55-56
66-77
55-77
AU
8-10
10-12
8-12
DE
34-36
36-38
34-38
DK
34-36
36-38
34-38

 FOOT MEASUREMENTS
S/M
M/L
IN
8.5-10
10-11
CM
22-25.5
25.5-28


TOE SOCKS SIZING

SOCK SIZE
 ONE SIZE
US
W5–9 / M3.5–7.5
EU
35–40
UK
3-7
FR
35-38
IT
39–42
JP
22-25.5
KR
220–255
AU
5–9
DE
34-38
DK
34-38

BABY SIZING

AGE 
FOOT LENGTH
EU SHOE SIZE
US SHOE SIZE
6 months -3 Years
4.3–5.1 in / 11-13 cm
16-21
1.5-6

DESIGN STORY

Smiley Face: Quiet Joy Within.

Our smiley Face is only "half" shown, the mouth is hidden because true joy comes from within. It represents the quiet, steady progress you make when no one is watching; the inner fulfillment of self-betterment.

If you’re drawn to Smiley Face, you carry strength inwardly. You don’t need to prove how you feel—you simply keep moving, grounded and steady.

Soft Landing Zone

Specially engineered achilles padding protects your most sensitive areas from shoe rub, providing a cloud-like feel during high-impact training.

Anatomical 3-in-1 Support

Internal arch cushioning paired with our Hugging Ring mimics your foot's natural mechanics, reducing strain and improving stability.

Sweat-Wicking Airflow

Vertical mesh channels and a breathable footbed ensure moisture-wicking comfort that hugs your foot without feeling restrictive.

FAQ

Are Coolmax® socks better than cotton for workout?

Absolutely. For any physical activity, Coolmax® socks are superior to cotton. Cotton stays wet, which leads to friction, discomfort, and bacteria growth. Coolmax® is a hydrophobic fiber that dries almost instantly. This specialized breathable performance fabric ensures your feet remain at an optimal temperature, preventing the "soggy" feeling that often ruins a good workout session.

Which seasons and activities are best for Coolmax® socks?

While Coolmax® is the undisputed champion for summer heat and high-intensity training (like HIIT, running, and fitness), it is truly a multi-season fiber. Its ability to keep feet dry makes it excellent for any scenario where you might sweat, from spring hiking to intense indoor gym sessions. It is the go-to choice for athletes who prioritize thermal regulation and dryness year-round.

How should I wash and care for my Coolmax® socks?

To maintain the high-speed wicking technology and fiber integrity of your technical socks, follow these simple steps:

  • Machine Wash Cold: Use a gentle cycle (30°C) to protect the specialized Coolmax® fiber structure.
  • Wash Inside Out: Ensures a deep clean of the interior while protecting exterior patterns from friction.
  • No Fabric Softeners: Critical: Softeners clog the capillary channels, reducing the fabric’s ability to move moisture.
  • Air Dry or Low Tumble: These are rapid-dry socks; air drying is best to preserve the elastic Lycra for a long-lasting fit.
  • Avoid Bleach & Ironing: High heat and harsh chemicals break down synthetic polymers and ruin the technical performance.
Why do Semibold Coolmax® socks feel soft like cotton rather than slick like Nylon?

At Semibold, we prioritize tactile comfort alongside technical performance. we specifically select softer, finer Coolmax® yarn constructions that prioritize next-to-skin comfort. This allows the socks to maintain a cotton-like softness while still delivering high-performance moisture-wicking and breathability. The result is a rare balance of comfort + performance, avoiding the stiff or plastic-like feel often associated with synthetic fibers.