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White king pillow for back & side sleepers, extra-firm support
Two white pillows on a bed for back and side sleeping
White king pillow for back and side sleeping, with soft seam details
White king back and side sleeper bed pillow, extra-firm support, rectangular shape
White bed pillow with care-instructions icons and washing directions on label
White king bed pillow with smooth cover, flat front and rounded edges
White extra-firm bed pillow with 3 in gusset and hypoallergenic fiberfill
White king pillow for back & side sleepers, extra-firm support
Two white pillows on a bed for back and side sleeping
White king pillow for back and side sleeping, with soft seam details
White king back and side sleeper bed pillow, extra-firm support, rectangular shape
White bed pillow with care-instructions icons and washing directions on label
White king bed pillow with smooth cover, flat front and rounded edges
White extra-firm bed pillow with 3 in gusset and hypoallergenic fiberfill

Mainstays Back & Side Sleeper Bed Pillow, King - Extra Firm Support

$15.91 $35.91( / )
Shipping Free.
Mainstays Extra Firm Back and Side Sleeper Pillow provides comfortable support for you while you sleep. It's designed for individuals that sleep on their back or side to ensure a quality sleeping experience. Plus, you can enjoy an antimicrobial treatment up to 15 washes. For adult and children use. Keep...
  • Single (King)
  • Single (Standard/Queen)
  • 2 Pack (King)
  • 2 Pack (Standard/Queen)
  • 4 Pack (King)
  • 4 Pack (Standard/Queen)
  • 8 Pack (King)
  • 8 Pack (Standard/Queen)
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Mainstays Extra Firm Back and Side Sleeper Pillow provides comfortable support for you while you sleep. It's designed for individuals that sleep on their back or side to ensure a quality sleeping experience. Plus, you can enjoy an antimicrobial treatment up to 15 washes. For adult and children use. Keep your body comfortable, relaxed, and get your best night's sleep with the Mainstays Extra Firm Back and Side Sleeper Pillow!
  • Provides extra firm support for back and side sleepers 
  • Hypoallergenic polyester fill is soft, clean and comfortable 
  • Antimicrobial Protection inhibits the growth of odor-causing bacteria, helping to keep your pillow fresher in-between washes
  • Easy Care Instructions machine wash warm; Only Non-chlorine bleach when needed; tumble dry on delicate/low heat 60+-6 C or 140+-10 F. Max dryer exhaust temperatures vary by brand. It is recommended that the lowest dryer temperature be utilized and that the item be removed when it is dry rather than when the dryer stops running, iron low heat 

🚚 Free Shipping & 30-Day Free Returns

Enjoy Free Standard Shipping across the USA and 100% Free 30-Day Returns with zero restocking fees.

📦 Shipping Policy

  • Target Destination: We ship exclusively to physical addresses within the 50 United States.

  • Order Processing (Handling Time): 0 to 3 business days (Mon – Fri). Orders placed after 5:00 PM ET or on weekends begin processing the next business day.

  • Transit Time: 0 to 3 business days (Mon – Fri).

  • Total Estimated Delivery: 1 to 6 business days.

  • Tracking: A tracking number will be emailed to you as soon as your order ships.

🔄 Return & Refund Policy

  • 30-Day Return Window: Items can be returned within 30 days of delivery.

  • 100% Free Returns: We provide a prepaid return shipping label for all eligible returns (including customer remorse, wrong size, or defective items).

  • Zero Restocking Fees: We do not charge any restocking or return fees.

  • Item Condition: Must be new, unused, and in original packaging with all accessories included.

  • Fast Refunds: Once inspected at our warehouse, your full refund is processed back to your original payment method within 7 business days.

⚠️ Damaged or Incorrect Orders?

If your item arrives damaged, defective, or incorrect, please notify us within 48 hours of delivery with photos of the item and packaging so we can expedite a free replacement or instant full refund.

📩 How to Start a Return or Inquiry

Returns are accepted by mail with prior authorization. Contact our customer care team with your order number: