Go to Walgreens.com and search for CPAP Multi-Mask Pillow in the upper right-hand corner of the homepage.
Click "Add to Cart" if you want to purchase the CPAP pillow from the Walgreens website. Click "Cart" at the top of the page and then "Checkout." Enter your shipping information and credit card or debit card billing information to purchase the CPAP pillow online.
If you would rather purchase the pillow in person, click the "Find at your local Walgreens" tab on the product page for the CPAP pillow. Type your zip code into the pop-up box to find the address and contact information for a Walgreens in your area that carries the CPAP pillow.
Call the store you have chosen to be sure they have the CPAP pillow you need.