The Össur Unloader One X has perforated rigid thigh and calf shells, a single upright polycentric hinge and crossing Dynamic Force System straps. Its low-profile frame includes soft edges, padded liners, SmartDosing dials and Quick Fit buckles.
Perforated rigid thigh and calf shells with soft edges.
Single upright polycentric hinge.
Crossing Dynamic Force System straps.
Integrated SmartDosing dials with BOA components.
Quick Fit buckles and color-coded touchpoints.
Padded liners and a calf strap.
Standard and Short frame configurations, with separate right/left and medial/lateral configurations.
Product details and sizing stay here with BFY. This showcase is educational; your clinician guides product selection and use.
BFY / SIZING & FIT
Find your fit.
Product sizing information stays here with Befitting You. Our team can help confirm measurements and fitting requirements.
BFY can help confirm the published calf-size band, frame length and right/left and medial/lateral configuration in person, including measurements at the shared size boundary or outside the published ranges.
Unloader One X OTS — current consolidated calf sizes
Measurement: Calf circumference measured 15 cm (6 inches) below mid-patella, with the leg in extension. Both centimeter and inch ranges are reproduced as published in the current US manufacturer catalog.
Unloader One X OTS — current consolidated calf sizes — sizing reference
Published size band
Calf circumference (cm)
Calf circumference (inches)
XS–M
25–43
9¾–16¾
L–XL
43–62
16¾–24⅜
These are the consolidated OTS size bands in the exact Unloader One X catalog currently linked by the manufacturer; they are not five individual stock-size ranges.
The same bands are listed for Standard and Short frames and for right medial, right lateral, left medial and left lateral configurations.
Original published centimeter and inch values are retained without recalculation.
The bands share the 43 cm / 16¾ inch boundary in the source. No boundary-priority rule is published; BFY can assist with size confirmation.
This table does not apply to the separately named Unloader One X Custom, the earlier Unloader One or an accessory sleeve.
Unloader One X OTS — Standard and Short frame length
Measurement: Leg length measured from floor to groin, as specified in the manufacturer catalog. The published threshold is 85 cm (33.5 inches).
Unloader One X OTS — Standard and Short frame length — sizing reference
Frame configuration
Leg length (cm)
Leg length (inches)
Standard
> 85
> 33.5
Short
≤ 85
≤ 33.5
The manufacturer publishes Standard for leg length greater than 85 cm (33.5 inches) and Short for leg length at or below 85 cm (33.5 inches).
These are leg-length thresholds, not the physical lengths of the braces and not total-height measurements.
Both frame configurations are listed in both consolidated calf-size bands and in separate right/left and medial/lateral configurations.
Original source units and inequalities are retained; no new product variants are created by this table.
Sizing is a product reference, not a treatment recommendation or a guarantee of fit. If you are between ranges or unsure of a measurement, talk with BFY before choosing a size.
