The 100% all-natural cotton cover delivers softness with an all-natural duck feather fill. Each 4-pack contains four pillows and is available in three size options to supply comfort for any sleep position. Easy care as these pillows are machine washable. Oxipower wash exceeds the industry standard for cleaning natural fill contents, washing our material 18 separate times ensures a complete disinfected and hypoallergenic feather fill which is responsible down standard certified - "The RDS safeguards the welfare of geese and ducks that provide down and feathers for the products we all love". # Pieces In Set: 4 Features: Knife-Edge, Multi-Pack Sleeping Position: Multi-Position Thread Count: 233 Fill Weight: 28 oz. of Fill Pillow Size: Standard Measurements: 4 Depth/Inches, 26 Width/Inches, 20 Length/Inches Base Material: 100% Cotton Filling Content: 100% Duck Feathers Comfort Type: Medium Density Care: Machine Wash Decor Styles: Casual Certifications And Listings: Responsible Down Standard (rds) Material: Plain Weave Pillow Type: Bed Pillows Country of Origin: Imported Contains RDS Certified Down: The goal of the Responsible Down Standard is to ensure the waterfowl in the down supply chain are treated humanely.