Ocun Sigma
Ocun
The Sigma is a firm, aggressively downturned lace shoe from Ocun for sport climbing and bouldering. Ocun lists it as medium-width with a narrow heel. In stock at 11 shops from 13.00 EUR.
Maximum precision technical shoe built on the Competition last with lace closure. Features a two-part 3D Fit Hard midsole supporting both toes and arch for enhanced stability. Vibram rubber delivers reliable grip. 3D toe patch for precise hooking.
Best For
Best for sport climbing and bouldering on overhang and vertical terrain. Aimed at advanced climbers.
Among the 469 adult climbing shoes we track, the Sigma ranks in the top 17% for edging, the top 19% for pocket climbing and the top 26% for hooking.
Strengths & Trade-offs
Sigma strengths
- Lace precision for foot control
- Two-part midsole supports both toe and arch
- Soft 4mm Vibram XS Grip rubber
- 3D toe patch for precise toe hooks
- Downturn and stiffness suit vertical to 30-degree overhanging rock
Sigma trade-offs
- Not for wide feet - the last suits narrow to regular widths
- Long sock tongue can bunch up at the arch
- Aggressive shape is uncomfortable on walls below vertical
How the Sigma fits
Microfiber with minimal stretch. Most climbers take their street size, or half to one size down for a tighter performance fit. Narrow heel; best for narrow to regular-width feet.
Fit profile: medium width, standard forefoot volume, narrow heel, suits egyptian, roman and greek toe shapes.
Minimal stretch expected; moderate break-in; manufacturer suggests street size to one size down.
How it fit climbers with your foot shape: fit reports from feet like yours.
Sigma fit reports
3 scanned owners have reported how this shoe fits so far - not enough yet for a fit fingerprint; verdicts unlock at 5 owners. The reports come from climbers who measured their feet with the climbing-gear.com foot scanner and rated the fit of the shoes they own.
Stiffness
Measured stiffness: 0.50 on our 0-1 scale (0 = softest). Among aggressive shoes it sits between the La Sportiva Solution (0.43, softer) and the La Sportiva Genius (0.59, stiffer).
Sigma specifications
| Brand | Ocun |
| Model | Sigma |
| Closure | Lace |
| Downturn | Aggressive |
| Asymmetry | Strong |
| Toe Patch | Full |
| Heel Rubber | Full |
| Ankle Protection | None |
| Midsole | Forefoot |
| Midsole Stiffness | Medium hard |
| Rand | Tensioned |
| Upper Material | Synthetic |
| Weight (pair) | 500 g (17.6 oz) |
| Break-in | Moderate |
| Rubber | Vibram XS Grip |
| Rubber Thickness | 4mm |
| Rubber Hardness | Soft |
| Durability | Moderate, High |
| Vegan | Yes |
| Resoleable | Yes |
| Kids | No |
What the Sigma costs
Prices checked 15 Oct 2026 across 11 shops that currently stock it (13.00 to 153.99 EUR). Cheapest current offer: 13.00 EUR at decathlon.es, 91% below the 150.00 EUR list price.
| Retailer | Price |
|---|---|
| decathlon.es | 13.00 EUR |
| bergfreunde.de | 84.98 EUR |
| barrabes.com | 124.75 EUR |
| kletterbude.de | 127.45 EUR |
| hardloop.de | 131.90 EUR |
| 8a.de | 134.99 EUR |
| bergzeit.de | 137.50 EUR |
| verticalextreme.de | 144.46 EUR |
| oliunid.de | 144.90 EUR |
| epictv.com | 144.90 EUR |
| + 1 more shops | |
Prices by size
Cheapest in-stock price per EU size and how many shops list that size, from the EU pool. Updated daily.
| EU size | From | Shops |
|---|---|---|
| 37 | 84.98 EUR | 10 |
| 37.5 | 124.75 EUR | 8 |
| 38 | 124.75 EUR | 9 |
| 38.5 | 124.75 EUR | 8 |
| 39 | 124.75 EUR | 9 |
| 40 | 124.75 EUR | 9 |
| 40.5 | 124.75 EUR | 1 |
| 41 | 124.75 EUR | 10 |
| 41.5 | 131.90 EUR | 8 |
| 42 | 124.75 EUR | 10 |
| 42.5 | 124.75 EUR | 9 |
| 43 | 124.75 EUR | 9 |
| 44 | 124.75 EUR | 9 |
| 44.5 | 124.75 EUR | 1 |
| 45 | 124.75 EUR | 10 |
| 45.5 | 131.90 EUR | 8 |
| 46 | 124.75 EUR | 10 |
| 46.5 | 124.75 EUR | 6 |
| 47 | 124.75 EUR | 7 |
| 48 | 124.75 EUR | 6 |
Similar Climbing Shoes
- La Sportiva Genius
- Evolv Phantom
- Evolv Shaman Lace
- Butora Acro
- La Sportiva Miura VS
- La Sportiva Miura VS Women's
Prices, stock and owner fit data on this page update daily. You are welcome to cite these figures if you name climbing-gear.com and link to this page - see our data terms.