1. Standard Dimensions: Fits standard square pillowcases perfectly. Each insert measures 18 x 18 inches (45 x 45 cm). 2. Dual Purpose: Suitable for both indoor and outdoor use. This pack of 2 water-resistant pillow inserts provides comfort and support for a variety of decorative pillowcases. 3. Hypoallergenic Filling: Free from odors or allergen retardants. Features 100% hypoallergenic microfiber polyester filling. 4. Water Resistant: Protects against splashes, dust mites, and mildew thanks to a built-in water-resistant liner. 5. Secure Stitching: Firm and comfortable cushion appearance achieved with sealed safety stitching along all edges. 6. Compressed Packaging: Contains two pillows in a compressed package. Pat after opening to achieve full plushness.