Dog Car Sling Keep your car clean when transporting your faithful companion $79.50 A dog at his best performs in the field. Deliver him safe and focused in Filson's Car Seat Sling. 100% Cotton. 11 oz Dry Finish Tin Cloth. Dimensions: 54" x 56". 4 adjustable straps to attach to car seats. Green bound edge trim. Machine Wash. Made in USA.