The Mainstays Extra Firm Support Pillow is designed ideally for those who sleep on their sides or back. The 100% hypoallergenic polyester DACRON fiberfill used in these pillows makes it durable, as well as comfortable. The SUPERSIDE 3 inch gusset construction provides an extra firm support for side or back sleepers. This pillow also features a soft microfiber polyester fabric cover with a printed gusset. In addition, this hypoallergenic pillow is suited to be machine washable for your convenience. These pillows come in Standard/Queen 17" x 28" x 3". We also offer these pillows in a Firm support for back sleepers.