Fit matters more than almost anything else in comfortable, productive pumping. The Luna Breast Shields come in 21mm and 28mm two-packs, letting you size to your nipple diameter rather than the default. A shield that's too large draws in areola and causes rubbing; one that's too small pinches and reduces output. If you're between sizes or your needs change over your feeding journey, keeping both on hand is common — many parents differ side to side.

Pump valves and tubing are wear items, not one-time buys. The Luna Valves 2-Pack should be swapped when you notice weakening suction or slower flow — usually every few weeks with daily use. The BPA-free replacement tubing restores a proper seal if a line cracks, stretches, or collects moisture. Stocking spares means a worn valve never sidelines a pumping session.

All parts in this collection are made specifically for the Motif Luna system, so compatibility is assured. Explore the full range above to build your setup or restock the pieces you use most.