the tough-shell wheeled collapsible pet carrier is composed of a tough-shell outer exterior and a soft shell tough middle exterior.The bottom of this dog carrier features all-terrain tough rubberized wheels for a nice smooth ride on both indoor and outdoor surface areas with an extendable wheeled handle bar.Additionally, this pet carrier collapses to 3 inches narrow as the two outer shells collide and zip together.This pet carrier comes with over-the-shoulder straps and a built-in leash holder inside.Available in multiple colors.Sizing measurements in inches (l x w x h) carrier portion: 17.8 x 11.1 x 13.7 with handle extended: 17.8 x 11.1 x 38