1.75 nylon webbing adjustable chest and girth straps. Velcro closure on chest and girth straps. COBRA slide lock upgrade available. MOLLE platform for attaching additional pouches and accessories. Velcro strips for attaching patches and name strips. Handle for positive control/Two D-rings for leash connection. Medium size: Chest 11-13/Girth: 25-30. Large size: Chest 14-22/Girth:30-45.