The Vevor breast pump backpack is designed to carry compatible S1 and S2 pumps along with bottles, accessories, and daily essentials in an organized layout. Its insulated waterproof storage area and included ice pack help keep breast milk fresh for up to 4 hours. Multiple internal and external compartments make it easy to store pumps, wipes, brushes, chargers, and personal items. The backpack-style design, padded strap, and included waterproof mat make it practical for work, travel, and family outings.