An implant comprising: an implant material comprising: a reference comprising a centerline marking, located at a midline or center of the implant material, a first tension indicator, the implant material having a first implant material end, a second implant material end, a length of implant material between the first implant material end and the second implant material end, wherein the length of implant material can be increased and decreased, the first tension indicator extending along a length of implant material, the first tension indicator including: a first end fixed relative to a first position of the implant material, a second end fixed relative to a second position of the implant material, a first middle segment extending along a length between the first position and the second position, the first middle segment comprising an extensible segment and an inextensible segment, and a first cursor (20, 20a, 20b) located on the inextensible segment of the first middle segment, wherein when the length of implant material between the first position and the second position is increased, the first cursor moves in a first direction relative to the reference, and when the length of the implant material is decreased, the first cursor moves relative to the reference in a second direction opposite the first direction; and wherein the implant material comprises a second tension indicator including: a first end fixed relative to a third position of the implant material, a second end fixed relative to a fourth position of the implant material, a second middle segment extending along a length between the third position and the fourth position, and a second cursor located on an intextensible segment of the second middle segment, wherein when the length of implant material between the third position and the fourth position is increased, the second cursor moves in the second direction relative to the reference, and when the length of the implant material is decreased, the second cursor moves relative to the reference in the first direction opposite the second direction. a reference comprising a centerline marking, located at a midline or center of the implant material, a first tension indicator, the implant material having a first implant material end, a second implant material end, a length of implant material between the first implant material end and the second implant material end, wherein the length of implant material can be increased and decreased, the first tension indicator extending along a length of implant material, the first tension indicator including: a first end fixed relative to a first position of the implant material, a second end fixed relative to a second position of the implant material, a first middle segment extending along a length between the first position and the second position, the first middle segment comprising an extensible segment and an inextensible segment, and a first cursor (20, 20a, 20b) located on the inextensible segment of the first middle segment, a first end fixed relative to a first position of the implant material, a second end fixed relative to a second position of the implant material, a first middle segment extending along a length between the first position and the second position, the first middle segment comprising an extensible segment and an inextensible segment, and a first cursor (20, 20a, 20b) located on the inextensible segment of the first middle segment, wherein when the length of implant material between the first position and the second position is increased, the first cursor moves in a first direction relative to the reference, and when the length of the implant material is decreased, the first cursor moves relative to the reference in a second direction opposite the first direction; and wherein the implant material comprises a second tension indicator including: a first end fixed relative to a third position of the implant material, a second end fixed relative to a fourth position of the implant material, a second middle segment extending along a length between the third position and the fourth position, and a second cursor located on an intextensible segment of the second middle segment, a first end fixed relative to a third position of the implant material, a second end fixed relative to a fourth position of the implant material, a second middle segment extending along a length between the third position and the fourth position, and a second cursor located on an intextensible segment of the second middle segment, wherein when the length of implant material between the third position and the fourth position is increased, the second cursor moves in the second direction relative to the reference, and when the length of the implant material is decreased, the second cursor moves relative to the reference in the first direction opposite the second direction.