The reserve is stowed in a container in the harness, under the seat or in the back depending on the model, or in a front container, in front of you. Its handle stays within reach.
Not every reserve fits every container: the packed volume has to match. Product pages give it: 2.5 litres for the AirDesign Donut SL in size 90, compared with 6 litres for the Supair Fluid in size L. A light reserve goes with a light harness, for hike-and-fly.
At the Aerotech workshop in Gréolières, where Pierrot repacks reserves, the reserve is fitted into your harness, then the workshop checks the fitting and tests the extraction with the handle. Changing harness? Have your reserve refitted the same way: our guide to choosing a paragliding harness presents the different types of harness.
Aerotech's A1 package, built around the school wing used on our courses, brings together the wing, the Ozone Halo harness, the Ozone Angel V2 reserve fitted in the harness, and the helmet. Our buying a paraglider page gathers our advice for getting equipped with Aerotech.