Small dog pet cat self backpackMaterial: Canvas Pattern: cartoon Hardness: medium to soft Sponge breathable mesh: the role of breathable sweat absorption Nylon fabric: using high grade special fabrics for schoolbags The backpack comes with a traction rope, which is about 115cm long S: Bust 32 38cm, backpack size: 10*3*12cm L: Bust 38 40cm, backpack size: 12*5*15cm Due to the production batch and manual measurement, the size may have an error of 2 3cm.