Wedge Pillow for Side Sleepers: 5 Reasons to Put the Harbor Behind Your Back
1. A side-sleeper wedge sits behind the back.
Choose a small, firm side-positioning wedge to hold a side-lying position. Harbor sits behind your lower back. A large incline wedge goes under the head and torso instead, so it is a different shape for a different position.
Place the triangular wedge against your lower back while lying on your side, rather than using it as a head pillow. Check the fit on your own mattress and choose a position that feels comfortable for you.
2. Firm foam keeps the triangular shape in place.
Harbor uses firm support foam, deliberately not memory foam. The core is there to hold a defined triangular shape behind your back rather than slowly mould around you. That construction matters when you are choosing a wedge for a side-lying position.
There are no straps, valves or loose parts to fasten before use. The shape does the positioning work. This is a comfort and positioning product, not a medical device. Comfort varies by sleeper and mattress.
3. The cover comes off without washing the core.
A full-length zipper lets you remove the deep-blue woven polyester cover for washing. Machine wash it cold on a gentle cycle with mild detergent, then air dry or tumble dry low. Keep the cover separate from the foam while cleaning.
Never wash the foam core. If it becomes damp, blot it and let it air dry fully before replacing the cover. The removable cover is the washable part, not a reason to put the whole wedge in a machine.
4. A small footprint leaves the rest of the bed free.
Harbor measures 50 x 25 x 15 cm / 19.7 x 9.8 x 5.9 in. It sits beside your back rather than extending beneath your whole upper body. Measure that space on your bed and check where you want the wedge to rest.
The small wedge can move with one hand when you change the bedding. An incline wedge is a larger support under the torso, not a side-positioning wedge behind your back.
5. The same simple wedge can go under knees or ankles.
Behind the back is the side-positioning use. Harbor also sits under the knees or ankles for gentle elevation when you rest. Choose one use at a time and check that the foam triangle lies flat on the bed.
That does not turn it into an adjustable head-and-torso incline. The dimensions and firm core remain the same wherever you place it. A small positioning wedge behind the back and a larger wedge under the torso do different jobs.
BONUS: Air it on arrival, then give it a flat home.
Air out the wedge for 24 to 48 hours when it arrives. Store it flat and uncompressed, with nothing heavy sitting on the foam. The deep-blue zippered cover can then stay ready for the next time you need the wedge.
Free standard shipping on every order. Orders are usually dispatched within 24 hours. 30-day risk-free trial. Published Oct 3, 2026 by Calm Eden Sleep Journal. For the dimensions, foam and cover details, see the Harbor wedge page for the shape and size.
The Difference Is In The Shape
Side-Positioning Wedge vs. Incline Wedge
Firm foam with a removable cover
Sits behind the lower back
Holds a side-lying position
Leaves the rest of the bed free
Small enough to move with one hand
The Difference Is In The Shape
Side-Positioning Wedge vs. Incline Wedge
Firm foam with a removable cover
Sits behind the lower back
Holds a side-lying position
Leaves the rest of the bed free
Small enough to move with one hand
Harbor positioning checklist
| Check |
What is stated |
Practical question |
| Position |
Side-positioning, not a torso incline |
If you want to raise your head and torso instead, see the Talus. |
| Core |
Firm support foam; not memory foam |
Do I want a defined triangular shape? |
| Cover |
Zippered polyester; machine wash cold |
Can I dry the cover before refitting it? |
| Size |
50 x 25 x 15 cm |
Have I measured the space beside me? |
| Storage |
Flat, uncompressed; air on arrival |
Is there a clear shelf for the wedge? |
FAQ
Which wedge pillow helps a side sleeper stay on their side?
A small side-positioning wedge sits behind the lower back rather than under the head and torso. Harbor is a firm triangular wedge for holding a side-lying position.
Is Harbor the same as an incline wedge?
No. Harbor sits behind your back, while a large incline wedge raises the head and torso for back lying.
What size is the Harbor wedge, and is it memory foam?
Harbor measures 50 x 25 x 15 cm / 19.7 x 9.8 x 5.9 in. It uses firm support foam, deliberately not memory foam, inside a deep-blue polyester cover.
How do I clean and store Harbor?
Unzip the cover, machine wash cold on a gentle cycle, then air dry or tumble dry low. Never wash the foam core; air out the wedge for 24 to 48 hours on arrival and store it flat and uncompressed.
What if the side-positioning wedge is not right for me?
You have a 30-day risk-free trial from delivery. If you are not happy for any reason, tell us within 30 days and return it for a refund, opened or used.
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