Hamtaro String Backpack Bag (Purple) Hamtaro kids String Backpack is a lightweight all purpose carry bag. Pull the strings and the bag encloses safely all your belonging. Carry around like a regular backpack. And when it's empty, you can fold it and store in your pocket like a piece of paper. Nylon fabric, durable and machine washable. Measures approx 12"x14". Price: $9.95 Hamtaro String Backpack Bag (Pink) Hamtaro kids String Backpack is a lightweight all purpose carry bag. Pull the strings and the bag encloses safely all your belonging. Carry around like a regular backpack. And when it's empty, you can fold it and store in your pocket like a piece of paper. Nylon fabric, durable and machine washable. Measures approx 12"x14". Price: $9.95