Pet Backpack Dog Portable Carrier Breast Sandwich Dog Bag Cat Bag 1, Soft sandwich mesh cloth, high quality environmental protection material.outer face fabric:70% Polyester / 30% PVC Lining fabric:100% Polyester 2, Ultra wide shoulders with sponge, 2.8 inches, safe and comfortable Collapsible rope design, can be adjusted according to the size of the head of pet baby, minimum length can to 2.4 inchesThe waist straps provide reinforcement effect, reduce shoulder weight, more comfortable 3, There is buckled rope inside the backpack, can buckle on the dog's collar, can prevent the dog escape from prison,travel is safe 4, Package edge is thick,and lined with rubber cushion,let the dog more free and comfortable, keep good moodBackpack pocket design, convenient to carry food and water, let baby travel more convenientJoint use back glyph go line, more solid 5, Size small14.6*5.5*15 inches. for Pets up to 5.5 lbs. Size medium15.7*7*17 inches. for Pets up to 11 lbs. Size large17*7.7*19 inches. for Pets up to 16.5 lbs