This ERGObaby Original Baby Carrier drops from the sale price of $91.73 to $63.73 plus free shipping at REI.com. Note: The discount will not show up until checkout. This was the lowest price we found by $29. The baby backpack keeps the child cradled in a natural sitting position and it's made of 100% cotton lined with 400-thread-count cotton poplin. It carries kids up to 45 lbs. It's available in mystic purple or camel. Sales tax is charged in most states.