Inclusion Criteria:  Subject provides written informed consent for study participation using an independent ethical committee (IEC) / institutional review board (IRB) approved consent form; Subject is between eighteen (18) and seventy (70) years of age, inclusive at the time of screening; Subject is willing and able to participate in required follow-up visits and is able to complete study activities; Subject requires a meniscal repair or meniscal allograft transplantation; Subject is suitable to participate in the study in the opinion of the Investigator.  Meniscal Repair ONLY:  1. Subject requires a meniscus repair concerning the red-red or red- white zones for acute or chronic 1-, 2- or 3-segment lesions, with or without associated anterior cruciate ligament (ACL) reconstruction.  Meniscal Allograft Transplantation ONLY:  1. Subject requires a MAT for symptomatic meniscal insufficiency (load- related pain and swelling in the compartment undergoing meniscectomy) for which conservative treatment has failed.  Exclusion Criteria:  Contraindications (per the FAST-FIX FLEX IFU) or hypersensitivity to the use of the FAST-FIX FLEX implant material. Where material sensitivity is suspected, appropriate tests should be made and sensitivity ruled out prior to implantation; Participation in the treatment period of another clinical trial within thirty (30) days of operative visit, or during the study; Women who are pregnant, nursing, or of child-bearing potential who are not utilizing highly effective birth control measures; Any subject that meets the definition of a Vulnerable Subject per ISO 14155:2011 Section 3.44; Subjects with a history of poor compliance with medical treatment, physical therapy (PT)/rehabilitation, or clinical study participation; Patients with irreparable meniscal tears (i.e. grade 3 outerbridge osteoarthritis or greater, serious defects, multiple tears); Patients with multi-ligament tears (i.e. ACL tear is not associated with lateral collateral ligament (LCL) or medial collateral ligament (MCL) tears); Performance of a significant concomitant procedure, specifically a cartilage repair or restoration (excluding ACL reconstruction or repair) intended as a therapeutic intervention on the study knee; History of ipsilateral knee surgery, septic joint, or fracture; Pathological conditions in the soft tissue that would prevent secure fixation of the device; Physical conditions which would eliminate, or tend to eliminate, adequate anchor support or retard healing; The presence of infection; Conditions which would limit the patient's ability or willingness to restrict activities or follow directions during the healing period; Malalignment: genu varus and genu valgus angles greater than 5° with respect to the normal axis to indicate malalignment; Patients who had an Ahlback grade greater than II; Patients with a body mass index larger than 30.