Four Main Pass Types
Horizontal/Torso Pass

Pros:
- This type of pass secures the baby nicely against the wearers back and does not leave any openings at the baby's sides.
Cons:
- Carries that start with horizontal passes tend to be lower carries because the carry can only go as high as the wearer's armpits.
Ruck/Kangaroo Pass

Pros:
- Kangaroo passes tend to create a nice high carry where baby can easily see over the wearer's shoulder (in a back carry)
- This pass tends to be cooler in summer because you can get ventilation at the baby's sides.
- Kangaroo passes with a nice tight top rail are excellent for preventing leaning.
Cons:
- Kangaroo passes are not leg straightener-proof.
Rebozo Pass

Pros:
- Rebozo passes protect against leaning.
Cons:
- Rebozo passes do not protect against leg straightening.
Cross Pass

Pros:
- Cross Passes provide excellent protection against leg straightening.
- Cross passes can be airy and provide a little ventilation at baby's sides.
- These passes are used in many poppable carries.
Cons:
- Cross passes do not protect against leaning.
- Typically cross passes are not the first pass in a back carry. If a back carry begins with a cross pass (such as back cross carry or Half Jordan's Back Carry with the cross pass done first, the wrapper must keep a hand on baby until the second pass is complete to prevent a fall.
Reinforcing and Bunched Passes
Reinforcing Cross Pass

Pros:
- Reinforcing Cross Passes can help distribute the weight of a heavy baby a bit more.
- Reinforcing Cross Passes protect against leg straightening.
Cons:
- These passes do not provide any protection against leaning.
- They can be difficult to spread out and get high on baby's back because the pass can only start as high as the wearers armpit.
Bunched Cross Pass

Pros:
- Bunched cross passes can pin the "seat" of the carry in place.
- They provide protection against leg straightening.
- These passes are very quick to do.
- Bunched passes are airier in summer than spread passes.
Cons:
- Bunched cross passes provide no protection against leaning.
- Bunched cross passes do not add as much additional support and comfort to the carry as passes that are spread out.
Bunched Horizontal Passes

Pros:
- Bunched passes can pin the seat fabric in place.
- They are very quick to create.
- Bunched passes are airier in summer than spread passes.
Cons:
- Bunched horizontal passes do not provide protection against leg straightening or leaning.
- They do not add as much additional support to a carry as passes that are spread out.