The advantage of the BB004 :
1. the waist belt gives care-giver more support
2. the chest buckle can slide up and down, care-giver can choose their best position .
3. the check buckle holder can protect the care-giver's back and check .
4. the one-layer mesh gives baby very cool air .
5. the double security head support buckle ensure double security for baby .
6. 3 ways to carry baby meeting care-giver different demands.
7. the snap button can ensure safety for smaller baby.
8. the wide shoulder strap give more comfort to care-giver while doing carrying job .
9. the adjustable shoulder straps buckle above leg opening makes it easy to tight the carrier.
10.the air-breathable hole can let air come and go easily , the baby feels cool .