(4,167 Reviews)

Alpaca Work Socks - Heavy Duty

The workhorse — reinforced cushioning and breathable alpaca knit made for 12-hour shifts on concrete. No sweat, no odor, no hot spots.
BUY 3 GET 3 FREE

Color: Black

Size: Medium

SIZEMediumLargeX-Large
US MEN6-99.5-1212.5-15
US WOMEN7-9.510-13-

Not sure which size to choose? If you're between sizes, we recommend sizing down — alpaca relaxes slightly with wear. And if it's not quite right, returns are easy for 30 days.

CHOOSE YOUR SET

Free shipping on orders $50+ · 30-day guarantee

SHIPS BY: TOMORROW 🇺🇸 FAST US SHIPPING
BUY 3 PAIRS GET 3 PAIRS FREEMIX & MATCH ANY PAIR
Built for 12-hour shifts
Cool in extreme heat
Breathable mesh zones
Moisture wicking
Soft baby alpaca fiber
30-day guarantee

BUILT FOR MILD TO HOT (50° - 100°+ F)

0°F20°F40°F60°F80°F100°F
Cushioned for 12-hour shifts
Cool in extreme heat
Breathable mesh ventilation zones
Premium baby alpaca fiber blend
Moisture-wicking, odor-resistant
Reinforced heel and toe
FITMid calf
CUSHIONMax
LOVED BYTradesmen, first responders
MATERIALSPremium Peruvian baby alpaca fiber blend
VIEW MATERIAL COMPARISON CHART
CAREMachine wash cold, air dry
AVOIDBleach and fabric softener
NOTEKeeps its shape and softness wash after wash
FREEUS orders over $50
STANDARDCalculated at checkout for orders under $50
PROCESSINGShips within 1-2 business days
30 DAYSComfort guarantee — exchange or full refund
EXCHANGESWrong size? We'll swap it, easy
STARTMessage us with your order number
START A RETURN
PAIRS WELL WITH
ALPACORE Alpaca Compression Socks - heather gray knee-high15-20 MMHG Alpaca Compression Socks★★★★★9,428 ReviewsTen hours on concrete earns you compression. Graduated 15-20 mmHg from ankle to calf, same baby alpaca blend.15-20 MMHGEASES SWELLINGALL-DAY SUPPORT $44.90$49.95 SHOP THE COMPRESSION Add it and your order ships free — $79.85 together

Free shipping on orders $50+ · 30-day guarantee

TWELVE HOURS ON CONCRETE

Built for the people who don't get to sit down.

IMPACT PADDING AT THE HEEL

IMPACT PADDING AT THE HEEL

A thicker knit block right where concrete hits hardest. Takes the shock your boots and your knees have been taking all day.

STAYS UP THROUGH THE WHOLE SHIFT

A ribbed cuff that grips the calf without cutting into it. No sagging at hour six, no dug-in ring at hour twelve.

DRY FEET, NOT DAMP ONES

DRY FEET, NOT DAMP ONES

Alpaca moves sweat out instead of soaking it in. Same sock at clock-out as at clock-in.

TEMPERATURE REGULATING
BREATHABLE & LIGHT
SUPER SOFT ALPACA
MOISTURE WICKING
CUSHIONED COMFORT
WARM WITHOUT THE BULK
30-DAY GUARANTEE
ALPACA VS. THE REST
ALPACA
WOOL
COTTON
MOISTURE CONTROL
Repels water & sweat
Soaks it up, gets heavy
Holds sweat for hours
HEAT PERFORMANCE
Cool even at 100°F
Runs hot and itchy
Heats up fast
ODOR CONTROL
Odor-free by nature
Needs airing out
Smells by lunchtime
SOFTNESS
Baby-alpaca soft, zero itch
Scratchy on skin
Soft but soggy
DURABILITY
12-18 months daily wear
8-12 months
3-6 months
BACKED BY OUR 30-DAY GUARANTEE
BACKED BY OUR 30-DAY GUARANTEE
44,000+ REVIEWS
300,000+ PAIRS SOLD
30 DAY MONEY BACK GUARANTEE

FIND YOUR PERFECT PAIR

GREAT FOR
Daily wear
Travel, recovery, standing
Running, gym, on your feet
Sneakers, gym
Workdays on concrete
Hiking, long miles
Hunting, cold sits
BUILT FOR
Everyday (30° - 100°+ F)
Everyday (30° - 100°+ F)
Mild to hot (55° - 100°+ F)
Everyday (30° - 100°+ F)
Mild to hot (60° - 100°+ F)
Cool to mild (30° - 80°+ F)
Cold to mild (-20° - 60°+ F)
FIT + FEEL
Crew, light
Knee-high, 15-20 mmHg
Ankle, 15-20 mmHg
No-show, light
Mid calf, medium
Crew, cushioned
Over calf, medium
CUSHION
Light-medium
Medium
Medium
Light
Max
Medium
Max

SWIPE TO COMPARE →

FIND YOUR FIT

SIZE GUIDE

SIZEUS MENUS WOMEN
MEDIUM6 – 97 – 9.5
LARGE9.5 – 1210 – 13
X-LARGE12.5 – 15
SIZING

Between sizes? Size down. Alpaca relaxes slightly with wear, and a sock that shifts inside your shoe is what creates the hot spot you are trying to avoid.

Sizes are US shoe sizes. Our socks are unisex, so the men's and women's ranges overlap inside each size.

GOT QUESTIONS?

Alpaca fiber is naturally hollow — tiny air chambers wick moisture, release heat and trap warmth when you need it. It's softer than sheep's wool, drier than cotton, naturally odor-resistant and lanolin-free, so it's gentle even on sensitive skin.
View material comparison chart
Machine wash cold on the gentle cycle with mild detergent, then air dry. Skip bleach and fabric softener — they break down the natural fiber. They'll keep their shape and softness wash after wash.
Our socks are unisex and sized by US shoe size. Most styles run Medium (Men 6-9 / Women 7-9.5), Large (Men 9.5-12 / Women 10-13) and X-Large (Men 12.5-15). The Hiking and Trail Ankle socks use their own grid: Medium (Men 8-10 / Women 7-10), Large (Men 10.5-13 / Women 10.5-12), X-Large (Men 13.5-15). Between sizes? Size down — alpaca relaxes slightly with wear, and a sock that shifts inside your shoe is what creates hot spots.
View size guide
Our compression line uses graduated 15-20 mmHg support — firmest at the ankle, gentler up the calf. It should feel like a supportive hug, not restrictive. First-timers usually adjust within a day or two.
Every order is covered by our 30-day comfort guarantee. Not in love? Reach out within 30 days for an exchange or a full refund — wrong size swaps are on us.
Start a return
Orders are processed within 1-2 business days and US delivery usually takes 5-9 business days after that. Orders over $50 ship free — and you'll get a tracking link by email as soon as it's on the way.

WORN & LOVED BY 44,000+ CUSTOMERS

BEST SELLERS

CUSTOMER REVIEWS

4.66
4,167 Reviews
Comfort
PoorExcellent
DR Duane R Verified buyer
2 days ago

Twelve hour shifts on concrete

Framing all day. These are the first socks that do not leave my feet aching at the truck.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
MT Marlon T Verified buyer
5 days ago

My boots stopped stinking

Two days in the same pair and nothing. My old cotton socks were a biohazard by lunch.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / X-Large
Would recommend Helpful
CB Cheryl B Verified buyer
1 week ago

Bought for my husband, he hid them

He is an electrician and now guards his pairs from me. Ordered four more.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
GP Grady P Verified buyer
1 week ago

Max cushion is not a gimmick

You feel it under the ball of the foot the second you stand up on concrete.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
AV Ana V Verified buyer
2 weeks ago

Great, thicker than expected

Excellent sock. Just know they fill out a boot, so size accordingly.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
RK Rudy K Verified buyer
2 weeks ago

Summer job site

Ninety five degrees and my feet were not soaked. That was the whole reason I tried alpaca.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
TW Tomasz W Verified buyer
2 weeks ago

Heel has not blown out

Three months in. My old ones lasted five weeks.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / X-Large
Would recommend Helpful
BS Belinda S Verified buyer
3 weeks ago

No more end of day throbbing

Retail stockroom, nine hours. Big difference by week two.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
HL Hank L Verified buyer
3 weeks ago

Worth double the price

I would pay more. I say that about almost nothing.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
IP Ingrid P Verified buyer
3 weeks ago

Soft for a work sock

Expected burlap, got something my wife tried to steal.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
CO Cesar O Verified buyer
1 month ago

Stays up under the boot

No sliding, no bunching at the heel, nothing to fix mid shift.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
DM Dolores M Verified buyer
1 month ago

Kitchen shifts

Line cook, ten hours standing. These made the last two hours survivable.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
FA Fitz A Verified buyer
1 month ago

Good, but sizing is confusing

The sock is fine. I am between L and XL and neither is quite right.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
WD Warren D Verified buyer
1 month ago

Dry through a wet week

Rain all week, boots damp, feet somehow not.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / X-Large
Would recommend Helpful
YN Yara N Verified buyer
5 weeks ago

Bought six pairs

Tested one, ordered five more the same night.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
CH Clint H Verified buyer
5 weeks ago

Warmer in winter, cooler in summer

Same sock year round on the site. Did not think that was possible.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
PG Petra G Verified buyer
6 weeks ago

No blisters

Two blisters a month before. None in six weeks.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
OJ Odell J Verified buyer
6 weeks ago

Hospital housekeeping

On my feet nonstop. My ankles used to swell, not anymore.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
RC Ruthie C Verified buyer
2 months ago

Gift for my brother

He drives a forklift ten hours a day and called to say thanks.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
SM Sal M Verified buyer
2 months ago

Too thick for my boot

Quality is there but with my steel toes it was too much bulk. Refund was easy.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / X-Large
Helpful
NF Nadia F Verified buyer
2 months ago

Twenty washes

Still thick, still shaped right, no pilling.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
VB Vernon B Verified buyer
2 months ago

Cold warehouse

Unheated warehouse in January. First winter my toes were not numb.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
PT Perla T Verified buyer
3 months ago

My whole crew switched

Showed one guy, now four of us wear them.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
AR Amos R Verified buyer
3 months ago

The toe seam does not rub

Flat enough that I forget it is there.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
CD Corinne D Verified buyer
3 months ago

Landscaping season

Seven to five outdoors. Dry, no rubbing, no smell.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
BK Bo K Verified buyer
3 months ago

Wrong size shipped

Ordered XL, got L. Fixed fast and no charge, but I lost a week.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / X-Large
Helpful
RS Rita S Verified buyer
4 months ago

Still my best pair

Six months of daily wear and they are the ones I look for in the drawer.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
MA Milo A Verified buyer
4 months ago

Cheaper than replacing socks monthly

I was buying a new multipack every month. Not anymore.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful
JL Josie L Verified buyer
4 months ago

Feet dry all shift

I sweat a lot and this is the first sock that keeps up.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Medium
Would recommend Helpful
GW Gil W Verified buyer
5 months ago

The one I buy on purpose

Most socks I buy by accident. These I order deliberately.

Comfort
PoorExcellent
Review for Alpaca Work Socks - Heavy Duty — Black / Large
Would recommend Helpful