Choosing among climbing harnesses, ropes & quickdraws can be surprisingly difficult when two harnesses are close in price but differ in fit details, condition, and the amount of setup each one spells out. The Edelrid Jay II and Mammut OPHIR 3 Slide point to different buying priorities: one keeps the brief straightforward, while the other names more adjustment and carrying features. Here is the practical split for choosing between them.
Quick verdict
The Edelrid Jay II Adult Rock Climbing Harness is the clearer choice for shoppers who want an adult rock-climbing focus. The Mammut OPHIR 3 Slide is the better route for shoppers attracted to that specific model and its more detailed setup. The listed price gap is $3.01, so the configuration matters more than a large price swing.
Listed-price and configuration comparison
| Harness | Listed price | Listed configuration |
|---|---|---|
| Edelrid Jay II Adult Rock Climbing Harness | USD 45.00 | Medium; New |
| Mammut OPHIR 3 Slide Climbing Harness | USD 41.99 | Size S; Used |
Where each product wins
Edelrid Jay II
The Jay II wins for shoppers who prioritize a clear material description: durable materials are named for outdoor sports. That is a concrete reason to choose it when the shopping brief centers on outdoor gear and a straightforward description. The Blue/Aqua colorway is the main consideration for appearance-sensitive shoppers, so the harness makes the most sense when that presentation works with the rest of your kit.
Mammut OPHIR 3 Slide
The Mammut wins when adjustability and gear organization are priorities. The description names adjustable leg loops and waistbelt, Slide-Bloc buckles, and four gear loops, then adds a mesh carrying bag. Those are concrete details for a shopper who wants more than a basic harness description. The product also names sport climbing, trad, and multi-pitch routes, making it the more route-specific choice of the pair.
Product notes
Edelrid Jay II Adult Rock Climbing Harness

The Jay II suits a shopper who wants an adult rock-climbing harness with durable materials called out for outdoor use. Its New condition reinforces that straightforward choice, while the title's Medium size gives the shopper a defined configuration to compare against their needs. The concrete limitation is the Blue/Aqua colorway, which may not align with every kit, personal preference, or existing climbing setup. That makes the color choice a meaningful part of the purchase, even though the stated use remains outdoor rock climbing. If those priorities align, the Jay II has a clear buying case without needing a more complicated comparison.
Mammut OPHIR 3 Slide Climbing Harness

The Mammut earns its place when the named setup matters: adjustable leg loops and waistbelt, Slide-Bloc buckles, and four gear loops. Its split webbing design and mesh carrying bag add useful specificity without changing the basic decision: this is a Size S harness in Used condition. The Black/Red colorway may not be the preferred look for every climber, and the waist-belt measurement of about 31 inches makes the configuration important to match to your needs. Choose it when those listed details fit your plans; the concrete trade-off is that its condition and configuration need to be acceptable before the feature list becomes relevant.
Final choice by use case
- For an adult rock-climbing brief: choose the Edelrid Jay II Adult Rock Climbing Harness.
- For sport climbing, trad, or multi-pitch routes: choose the Mammut OPHIR 3 Slide Climbing Harness.
The Edelrid is the more direct choice when its stated purpose and material description are enough. The Mammut is the better match when its named adjustment, organization, and route details are the reasons you are shopping.