The primary objective of this study will be the collection of preliminary clinical evidence to indicate that Cast21 Short Arm Product is no worse than the current standard of care arm immobilization devices in pediatric patients.

A secondary objective will be to characterize the clinician and patient experience with the Cast21 Short Arm Product.

Inclusion Criteria:

• Demographic characteristics: all persons ages 3 and above, regardless of the race and sex will be eligible to participate in this study
• Medical condition: participants must present with a closed, nondisplaced, or minimally displaced distal radius fracture and/or distal ulnar fracture that does not require a bone reduction procedure within 10 days from the date of injury
• Sizing: participants eligible for the Cast21 Short Arm Product must undergo sizing conducted by the clinical staff to ensure fit into one of the products (sizes XS-L)

Exclusion Criteria:

• Participants requiring a surgical intervention
• Participants with moderately displaced or angulated fractures or fractures requiring a bone reduction procedure.
• Participants with a known history of bone diseases e.g. osteogenesis imperfecta or other pathologic bone conditions
• Participants with pathologic fractures e.g., presence of bone cyst
• Participants who smoke
• Participants with pre-existing skin infection or condition of the lower arm (participants exhibiting only minor skin abrasions, lacerations, or skin condition might be eligible per clinical investigator's discretion)