Fill options vary by listing: some include polyester fiber or polyester inserts, others include down inserts, and several items are sold as covers with no fill included.
Closure styles vary by product and include zipper closures on some covers and knife-edge construction on others.
The pillows and covers are made from silk. Several listings specify 100% silk, and some note 100% silk on both the front and the back.
Shapes include square pillows (most common), rectangular/lumbar shapes, and lumbar-specific listings for smaller sizes.
Color options include both neutrals and brights. Examples listed are Medium Gray, Camel, Black, Khaki, Blush, Taupe, Charcoal, and brighter tones such as Dark Purple, Bright Red, Bright Purple, Bright Pink, and Bright Orange.