Altera Performance
Built for hard wear. Backed for life.
Premium natural-performance socks engineered for real conditions. Every pair backed unconditionally for life — if they ever wear out, we replace them.
Biking
The alpaca wool used in these socks offers excellent breathability and temperature regulation, keeping your feet cool and ventilated even during intense biking excursions. Say goodbye to sweaty feet and hello to a fresh and dry sensation.
Backed for life
If they wear out, we replace them.
Every Altera pair carries the unconditional Lifetime Warranty. No fine print, no expiration, no original-purchaser clause.
See the warranty →