Mud River Dixie Insulated Kennel Cover MicroLite3 insulation Two-ply heavy-duty poly exterior shell Rubber mesh windows Removable window fllaps. Weather-resistant Four D-rings for tie down Medium (32 x 23 x 25) Large (36 x 26 x 26) Large-Extended (37 x 26 x 28.5) Extra Large (40 x 28.5 x 30)