Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Quick View Add to Wishlist Add to Wishlist Quick View by HDM, HDM, Humidifiers / Parts, Shop by ManufacturersZ1™ and Z2™ Travel CPAP Machine Heat Moisture Exchanger (HME) $7.99 The HME is a waterless humidification system that captures exhaled moisture and returns it to you when needed.