I currently use a Climbing Technology On-Sight harness which I find is super light and comfortable. The fabric is really breathable and it has 4 gear loops in convenient positions for me to reach. I particularly like that the leg loops are elasticated, which I have found makes it much easier to put on than my previous one with adjustable leg loops and it means it fits me perfectly every time. These also hold the harness in the right position and it doesn’t slip down whilst climbing.
So far, I have used it both indoors for leading and outdoors for leading sport and trad. For trad I found I can fit a lot on my gear loops which was useful as I needed to carry a variety of gear. It was also great for leading indoors and out as it was so light and comfortable while climbing.
I’m 13 and slim build and I use the adult ‘Small’ size but it comes in a wide range of adult sizes from XS to XL.
In conclusion, I think this is a great harness for those who want just one harness to lead trad and climb outdoors or indoors.
More technical details for this harness can be found on the Climbing Technology website
I was pleased to be given this harness as part of my sponsorship with Troll UK, but this review is honest and not affected by that.