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Adventure · Maximum Warmth · Extreme Durability

Adventure Heavyweight 9" Crew Alpaca Sock

Maximum cushion and crew-height coverage for cold mornings, hiking boots, work boots, and long days outside or on the job.

Adventure · Maximum Warmth · Extreme Durability

Adventure Heavyweight 9" Crew Alpaca Sock

Maximum cushion and crew-height coverage for cold mornings, hiking boots, work boots, and long days outside or on the job.

$36~$12 / year based on 3 years of wear

Adventure 9" Crew is our maximum-cushion heavyweight sock built for cold weather, hiking boots, work boots, hunting, and hard-wearing outdoor use. The thick knit adds warmth and underfoot comfort, while reinforced heel and toe zones help it hold up through rough terrain, boot friction, and repeated wear.

Color Brown Tweed
Size Medium

Unconditional Lifetime Warranty

If they ever wear out — heel, toe, cuff, anything — we replace them. No fine print, no original-purchaser clause, no expiration on any line we make.

See full warranty →
Why Adventure performs

maximum cushion for cold, demanding days.

Adventure is built for the days that ask more from your socks: cold starts, heavier boots, long hours, rough terrain, and repeated wear in the field, on the trail, or on the job.

01
maximum cushion
Our thickest knit adds underfoot comfort and impact absorption for long days in boots, cold-weather hikes, hunts, and hard-wearing work.
Mechanism · Heavyweight terry knit
02
cold-weather regulation
Hollow-core alpaca helps hold warmth when conditions are cold, then releases heat as your body warms up.
Mechanism · Hollow-core alpaca fiber
03
freshness for repeat wear
Built with natural alpaca and antimicrobial fiber to help socks stay fresher longer through extended wear and multi-day use.
Mechanism · alpaca + antimicrobial fiber
04
Reinforced durability
Reinforced heel and toe zones help handle boot friction, pack straps, rough terrain, and the repeated wear that breaks down lighter socks.
Mechanism · Reinforced zones
Specifications
Line
Adventure · Outdoor · Work
Height
9" Crew
Weight
Heavyweight full cushion · Full terry loop
Blend
42% Alpaca · 28% Polyester · 15% Nylon · 14% Antimicrobial · 1% Spandex
Best For
Cold weather · Hiking · Work boots · Hunting · Extended outdoor wear
Features
Reinforced heel and toe · Arch support · Crew-height boot coverage
Care
Machine wash cold · Tumble dry low · No bleach
Warranty
Unconditional lifetime — any wear-out, any age
Build your rotation

Choose The Cushion For The Conditions.

Most customers keep more than one Altera build in rotation — lightweight cushion for warmer days, reinforced midweight for long wear, and heavyweight coverage for cold conditions.

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