The ultimate wipesWARMER by Prince Lionheart is the number one selling wipes warmer worldwide. Prince Lionheart wipes warmers all feature the patented Ever-Fresh® System which is guaranteed to help keep your wipes the freshest they can be to soothe Baby's delicate skin. The patented Ever-Fresh System works three ways: 1) Anti-microbial: Both the wipe warmer’s tub and the Ever-Fresh pillow are treated with an EPA approved additive to inhibit the growth of microorganisms that may cause spoilage, odors and mildew. 2) Non-browning: Keeping wipes moist prevents most discoloration from occurring when wipes are warmed. Over time, additives typically found in baby wipes, cause discoloration as they warm. The Ever-Fresh System effectively insulates wipes from the warming surface, preventing browning. 3) Moisture Retention: The Ever-Fresh System keeps wipes moist by an evaporation and condensation process. Micro pores in the pillow trap and release water as needed to maintain moisture content.