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.
Mid-Weight Alpaca Socks
Don't compromise on comfort or performance. Choose Altera's most sought-after mid-weight collections and take your outdoor experience to the next level. Embrace the freedom of movement, enjoy unparalleled cushioning, and feel the difference that quality gear makes in your adventures.
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 →