Understand manual pressure and fit adjustments
Identify which parts move and what the manual says they do.
Read the adjustment description
Some models use a sleeve adjustment and others use an air release valve. A different shape or a second opening may change fit without an adjustable part. Check the exact listing and manual.
Find the release method
Read how to release pressure and remove the product before using it. Stop if you feel pain or discomfort. Do not force a component beyond the position described in the manual.
Check the box contents
A case, sleeve, cap and drying accessory can be separate. Check what ships and what can be replaced before choosing a product you expect to keep.