The two best-selling Backpacks currently are the Side carry ergonomic newborn wrap baby carrier backpack sling (red plaid), Side Carry Ergonomic Newborn Wrap Baby Carrier Backpack Sling FrontFacing Infant Organic Basket (Blue Ocean) intl and Baby Carrier Backpack Ergonomic Baby Carrier Infant Baby Carrier Sling Multifunctional Baby Carrier Wraps ( MY55-Blue ). The most popular Backpacks are from DreamKart, MAM and Bebe. Backpacks from these brands usually cost about S$ 7.00 to S$ 129.00. Depending on your needs, you can get Backpacks and Slings. Most Backpacks used today are in Yellow, Red and Purple. Up to 79% discounts on Backpacks can be found only on iprice.