The printed size is not enough
Two harnesses labelled the same size may fit differently. Model and body shape affect the feeling. During preparation, request a fitting check and explain if an area presses uncomfortably or the setup moves in a way you do not understand.
Describe where and when
“It feels uncomfortable” is a start; pointing out where and when helps more. Distinguish discomfort when putting it on from a problem arising during the exercise. Do not wait until the end to mention something affecting your concentration.
Make changes with assistance
Avoid changing connections yourself while still learning. Ask the instructor to review the setup before continuing. Familiarisation includes recognising components and systems, rather than simply tightening a strap until it feels secure.
Before buying a harness
Try the model with appropriate guidance and check compatibility with your intended equipment. Keep the exact reference of a suitable model. Buying by size alone or by a photograph does not ensure the same fit.
Official reference: Duotone · Repair & care
