A port pillow is a small, soft cushion that wraps around a seatbelt to protect a chemotherapy port (or similar implanted device) from pressure and friction. Typically about 4 by 6 or 7 inches, it fastens with Velcro strips so it stays in place on the shoulder belt right over the chest area where the port sits beneath the skin. It’s a simple, inexpensive product that solves a very specific and common problem: the seatbelt pressing directly against a tender surgical site every time you ride in a car.
Why Seatbelts Are a Problem After Port Placement
A chemo port is a small device surgically implanted under the skin, most often in the upper chest. A thin silicone tube connects it to a nearby vein, giving medical teams easy access for delivering chemotherapy without repeated needle sticks in the arm. The port sits in a small pouch created just beneath the bottom layer of skin, which means there isn’t much tissue between the device and the surface.
After placement, the site is bruised and sore for several days. Even once initial healing is complete, the area can remain sensitive to direct pressure. Kaiser Permanente’s post-operative guidelines specifically warn patients to be careful when pulling a seatbelt across the chest and to avoid clothing that rubs the skin over the port. A diagonal seatbelt crosses exactly where most ports are placed, and on a long drive or bumpy road, that repeated pressure can range from uncomfortable to genuinely painful.
How a Port Pillow Is Made
Port pillows are deliberately simple. The standard design, used by hospital volunteer programs and nonprofit sewing groups alike, calls for two rectangular pieces of cotton fabric (usually quilting cotton or hypoallergenic material), polyester fiberfill stuffing, and a strip of sew-on Velcro about 3 to 3.5 inches long. One side of the Velcro goes on each inner edge of the pillow so it can be opened, wrapped around the seatbelt strap, and pressed closed.
The University of Iowa Health Care distributes them to chemotherapy patients and provides sewing instructions for volunteers. Many cancer centers, church groups, and organizations like Beyond Basic Needs run similar programs, recruiting volunteer sewers to produce port pillows in bulk. Because the materials cost only a few dollars, they’re almost always given to patients for free. You can also find commercially made versions online, often with added features like softer fabrics or slightly different shapes.
Beyond Seatbelts
While seatbelt protection is the primary use, port pillows serve other purposes too. Some patients tuck them between the port site and a crossbody bag strap, a backpack strap, or even a guitar strap. City of Hope, a major cancer research center, notes that specially designed port pillows can also help with sleep by reducing pressure and irritation when lying on the side where the port was placed.
Port pillows aren’t limited to chemotherapy patients either. The same basic design works for anyone with an implanted device near the collarbone or upper chest. People with pacemakers and implantable defibrillators use them for the same reason: a hard seatbelt pressing against a device just under the skin is uncomfortable. Commercially sold versions are often marketed for both chemo ports and pacemakers.
Seatbelt Safety Considerations
Adding anything to a seatbelt naturally raises the question of whether it affects safety. The National Highway Traffic Safety Administration has addressed seatbelt accessories in general terms. Their position is cautious: the agency does not guarantee that any aftermarket pad or cushion keeps a seatbelt system in full compliance with federal safety standards. Their specific concern is that a pad could prevent the belt’s retractor from reeling the strap back in completely, which would leave slack in the belt.
That said, port pillows are small and thin compared to bulky aftermarket seatbelt pads. The NHTSA also notes that federal restrictions on modifying safety equipment apply to manufacturers, dealers, and repair businesses, not to individual consumers. You’re legally free to attach a port pillow to your own seatbelt. To minimize any effect on belt function, keep the pillow positioned only where it’s needed (over the port site) and make sure the belt still retracts and tightens normally when you buckle in.
Where to Get One
Your cancer center or infusion clinic is the first place to ask. Many hospitals have volunteer programs that make and distribute port pillows at no cost. If your facility doesn’t offer them, nonprofit sewing groups supply them through online request forms. Beyond Basic Needs is one of the larger organizations coordinating volunteer sewers for this purpose.
If you’d rather buy one, online retailers carry a range of options from around $8 to $15. Some are plain cotton, others use fleece or minky fabric for extra softness. If you or someone you know sews, making one at home takes minimal supplies and about 20 minutes. Patterns are freely available from hospital and nonprofit websites, and the construction is straightforward enough for a beginner.