Petzl OUISTITI Kid's Harness & PICCHU Helmet
Neither are light, but if you're kitting out a smaller kid then this full body harness and dual-rated helmet from Petzl make a comfy and well-fitting combo
The latest version has been modified with a larger sizing, better gear loops and stronger Hypalon strips for ice-screw racking. The 'nappy style' design is simple to use and makes it straight-forward to pull the leg loops out of the way for 'accident free' calls of nature. The 44 mm webbing chosen for the Super Couloir is durable and an ideal balance between weight and comfort.
Importantly, it has a traditional belay loop (rated at 25 kN) making ropework less complicated. The minimal padding on the waist lessens water absorption. Like all DMM harnesses it has a unique ID number as part of our quality control system.
This harness has evolved with input from our sponsored climbers. One of them, Nick Bullock, is currently using just such a harness on his attempt with Andy Houseman at Chang Himal's (a.k.a. Wedge Peak) unclimbed 1500 m North Face. Asking Nick what he liked about the Super Couloir before he left for Nepal, he said: "I like the weight of it for alpinism and the wider webbing makes the harness comfortable when you're wearing it for long periods of time. However, at night I can easily unclip the leg loops while still enjoying the security of being tied-in to the belt."
See this product at the Joe Brown - Snowdonia shop