Friday, 08 May 2026 09:34

Arc’teryx latest innovation, the Lithos SL Harness

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The Lithos SL Harness is Arc’teryx’s pinnacle sport-climbing harness, engineered for redpoint attempts, competition climbing, and high-end performance.

Developed in collaboration with elite climbers like Alannah Yip and Jonathan Siegrist, the Lithos SL sets a new standard for harness durability and sizing under a new structural platform.

Arcteryx 251004 S26Lithos Studio SG 7132 ext shrp

KEY FEATURES:

  • Next-gen Warp Strength Technology™ is thinner, lighter, and more durable.
  • New sizing system features six waist sizes with two leg loop options each for a custom fit.
  • Continuous leg loops and an ultra-strong belay loop are obsessively designed for durability and freedom of movement.

TECHNICAL DETAILS

  • WEIGHT:
    • 275g (4A)
  • SIZING / FIT
    • Unisex: Sizes 1A–6B
    • Neutral fit with customizable waist-to-leg-loop ratio
  • MATERIALS
    • Primary: 56% Nylon, 34% Polyester, 10% Elastane
    • Secondary: 100% Nylon
    • Fabric: Burly™ Double Weave, 220gsm
    • Water repellent

The Lithos SL features a new industry-first sizing system that replaces gender-specific fits with six waist sizes and two leg loop options per size, providing more freedom of choice across a range of body shapes and allowing climbers to dial in a truly personalised fit.

Lithos SL part 1

Lithos SL part 2