A restraint may include a longitudinal body having a first end and a second end. The restraint may also include a plurality of engagement features distributed between the first end and the second end. A dimension of at least one of the longitudinal body and the plurality of engagement features may vary along at least a portion of a length of the longitudinal body. The restraint may further include a head disposed at the first end of the longitudinal body. The head may define an aperture and may include a pawl that configured to individually engage the plurality of engagement features. The dimension may vary incrementally or continuously along at least the portion of the length of the longitudinal body from the first end to the second end.