Prioritize carrier frequency and feeder connectivity, bonded and customs handling, SLA guarantees for transit/dwell, inventory visibility (WMS integrations), and local last‑mile carrier networks. Also assess seasonal scalability, cold chain capacity if required, and value‑added services like kitting and returns processing.

Expect shorter intraregional feeder legs but potentially fewer weekly sailings; air options are limited and costlier. Total lead time depends on consolidation schedules at transshipment points—good 3PLs optimize cutoffs and consolidation to minimize dwell and reduce overall landed time.

Negotiate volume-based rates for storage and pick/pack, consolidate shipments to reduce per‑unit sea freight, use cross‑dock to lower handling, leverage shared cold storage for seasonal peaks, and align inventory thresholds to reduce safety stock and holding fees.

Ensure the 3PL offers customs brokerage or certified partnerships, bonded warehousing, accurate HS code classification, duty/pay handling, and electronic documentation for imports and exports. Timely clearance processes reduce port storage charges and speed final‑mile delivery.

Look for reverse logistics workflows, localized returns hubs or inspection zones, clear disposition policies, and carrier integrations that support pickups and refunds. Integration with your OMS and real‑time visibility are critical to maintain customer experience and cost control.