Knitted Nitinol Design – designed to exert constant, gentle radial pressure to maintain patency
Flexible Open Loop Design – epithelization of uncovered stent may promote mucociliary clearance
Resists Migration –  epithelization of ends may limit stent migration
Silicone Covering – on the covered version, covering helps resist tumor growth

Delivery System:
Low Profile – designed to facilitate advancement across tumors and may be placed via flexible or rigid bronchoscopy
Flexibility  –  the flexible delivery catheter is designed to enhance the ease of navigation through the airway
Radiopaque Markers – delivery catheter radiopaque markers are designed to target the deployed position of the stent
Distal or Proximal Release – different release systems are designed to allow the physician greater control over stent deployment