Harness Basics
A climbing harness is the most safety-critical piece of rock climbing equipment you'll wear. It must fit correctly, be in good condition (no visible wear on belay loop or tie-in points), and be an UIAA/CE certified design. Never buy a used harness without knowing its history — impact loads and UV exposure degrade nylon even without visible damage.
Fit & Sizing
The most important harness fit criterion: when hanging freely, the belay loop (the sewn bar tack at the front where the rope attaches) should be at your navel, not below your hips. The waistbelt should sit above the iliac crest (hip bones), not around the waist proper.
Measure your waist and thighs to cross-reference sizing charts. Most harnesses allow 3-5 inches of adjustment range on waist and leg loops. Choose a size where you're in the middle of the adjustment range — not at the extremes.
Harness Types
| Type | Best For | Features |
|---|---|---|
| Gym/Sport | Indoor bouldering, sport climbing | Lightweight, padded, quick adjustment buckles |
| All-around | Multi-pitch, sport, trad, gym | 4 gear loops, moderate padding, comfortable for long wear |
| Alpine | Ice climbing, mountaineering | Drop-leg design, works over thick clothing, minimal padding |
| Big wall | Multi-day aid climbing | Maximum padding, integrated leg loop padding, sit-harness feel |
Padding & Comfort
For gym climbing and single-pitch routes: minimal padding is fine. For multi-pitch climbing where you'll hang in the harness for extended periods: more waistbelt and leg loop padding is critical for comfort. The Black Diamond Couloir alpine harness is impressively light (200g) but uncomfortable for extended hanging. The Petzl Corax is more padded and better for all-day use.