The two best-selling Backpacks currently are the Side Carry Ergonomic Newborn Wrap Baby Carrier Backpack Pink, 0-30 Months New Ergonomic Baby Backpack Carrier Baby Sling Breathable Multifunctional Front Facing Kangaroo Baby Bag Infant Wrap intl and Vanker Infant Baby Carrier Backpack Practical Mom Front Back Carrying Sling Seat Bag (Green). The most popular Backpacks are from ed, MAM and Ubela. Backpacks from these brands usually cost about ₱ 355.00 to ₱ 41,996.00. Depending on your needs, you can get Backpacks and Slings. Most Backpacks used today are in Yellow, Red and Purple. Up to 75% discounts on Backpacks can be found only on iprice.