Common carrying styles include crossbody slings, soft-sided airline-style carriers with top handles and removable shoulder straps, and bike/front-basket-style carriers that can also be used as backpacks or booster seats.
Airline-compliant carriers list dimensions that fit under most airplane seats. They typically offer multiple carry options (top handle and removable shoulder strap). For car travel, look for side buckles or straps that secure the carrier to a car seat or luggage.
Carriers commonly include exterior zipper pockets, side pockets, strap-mounted mesh pockets, and built-in poop-bag dispenser pockets to hold treats, a collapsible bowl, phone, keys, and other small items.
Comfort features often include padded interiors or faux shearling bedding, padded shoulder straps and back cushions for the person carrying the bag, and breathable mesh panels to help pets stay comfortable and settled.
Common safety features include zipper locks or reinforced zippers, internal safety straps or leashes that clip to a pet harness, safety buckles/straps to secure the carrier to a car seat or luggage, and reflective trim for low-light visibility.