INSEN C-Shaped Pregnancy Pillow with Jersey Cotton Cover (58 in) review

The INSEN is a single 58-inch curve: the top hooks around your head, the middle runs along your body and the bottom hooks around your legs. BabyGearLab measured it at 58 inches long, 28 inches wide and 7.8 inches high^[1]. The Amazon listing gives the same length and width and a weight of 6 pounds^[2].

Its footprint is close to a U's, but it feels much less bulky. On paper, it's about as wide as the Momcozy U, which BabyGearLab measured at 27.6 inches^[1], so it still takes a little under half of a 60-inch queen and just over half of a 54-inch full^[3]. The difference is the open side. You can push the C flat against the edge of the bed, fold it in half, or slide out of it without climbing over a rail. BabyGearLab's testers preferred the C because it's far less confining during sleep, and noted that its smaller size lets you fold it into shapes a U can't manage^[1]. The Queen Rose U is wider still, at 31 inches^[4].

It's long enough for most people. BabyGearLab's 5-foot-7 side-sleeping tester found it reached her toes, which she said is rare for a pregnancy pillow^[1].

Decide which you need more each night: support for your front or for your back. BabyGearLab says you can use the INSEN with the open ends of the C in front of you or behind you, depending on where you need support^[1]. Face the long side and you can hug it, rest your bump on it and keep your knees apart on the lower curve. BabyGearLab found that it holds the natural spacing between your legs, which keeps knees and ankles from aching^[1]. Turn it around and the long side runs down your back instead. Babylist sums up the trade-off: a C supports your back or your front, but not both at the same time^[5].

Most nights, the front-facing setup is the one to start with. Carrie Pagliano, a physical therapist and American Physical Therapy Association spokesperson quoted by Babylist, says the main job of a pregnancy pillow is to keep your pelvis and hips aligned, with the pillow running between your knees and feet^[5]. Facing the long side, the INSEN's lower curve does exactly that, keeping the natural gap between your legs^[1], while the top curve holds your head and the middle takes your top arm and bump. You get one pillow under every point that needs it, instead of three loose ones that drift apart.

Expect to rearrange it during the night. BabyGearLab's tester found it hard to get belly and back support at the same time, and kept shifting around depending on what ached most^[1]. When you roll over, the C ends up behind you. You can use it as back support on that side or bring it round with you. If you have pelvic girdle pain, physiotherapists advise keeping a pillow between your knees and your knees together as you turn^[6]. With a C, that means taking the pillow with you as you roll, a step a U spares you.

Less back support isn't a safety gap. The NHS says the safest way to go to sleep in pregnancy is on your side, left or right, and that if you wake on your back you can just turn onto your side again^[7]. Pillows behind the back don't seem to prevent back sleeping anyway. In an Australian trial, a U pillow with a firm back rail didn't reduce the time women in late pregnancy spent on their backs, and women who wedged their own pillows behind them spent as much time on their backs as those who didn't^[8]. So choose by comfort, and see our body pillow guide for the evidence on sleep position.

The fill is a soft polyester fiber that you can add to or take out. The listing calls it “long silk fiber,” a high-density soft fiber, and gives the fill material as polyester^[2]. BabyGearLab's spec table uses the same “silk fiber” name^[1]. The listing rates the firmness as soft^[2], but BabyGearLab found thick padding that conforms to your body while still giving firm support where you need it^[1].

BabyGearLab called its thickness right for neck alignment for most testers^[1]. That matters on a C, because the top curve replaces your head pillow. If you have broad shoulders and your head tips down, add fill to the top. If your neck is pushed up, take some out.

It's the easiest of the three to adjust. BabyGearLab rated its stuffing access the best of the eight pillows it tested: a long zipper down the middle of the back lets you add or remove fill without a fight, and INSEN offers extra fill if the pillow compresses over time or isn't thick enough^[1]. The outer cover and the inner liner each have their own zipper^[2], so you can reach the fill without taking the whole pillow apart.

It can double as a wedge on heartburn nights. The NHS says propping up your head and shoulders when you go to bed can stop stomach acid coming up, and that sleeping on your left side can also help^[9]. INSEN suggests folding the C into a wedge for back support and to raise your legs^[2], and the same fold behind your shoulders gives you that lift. The trade-off is that a folded C no longer reaches your knees, so if you need both, a separate wedge under your shoulders lets the INSEN keep its usual job.

No. It was among the coolest pillows in BabyGearLab's tests, thanks to its cotton jersey cover. The listing gives the cover fabric as 100% cotton^[2]. BabyGearLab found the jersey wicked moisture and didn't hold heat, and marked it “retained heat: no”^[1]. A tester in her last trimester, who said she got sweaty every night, found it kept an even, cool temperature through the night^[1]. In the same tests, the velvet cover on the Momcozy U retained the most heat^[1]. Sleep Foundation describes cotton as a breathable fiber that absorbs moisture^[10].

That's not a small point in pregnancy. BabyGearLab notes that many pregnant women feel hot most of the time^[1], and with normal bedding, heat increases wakefulness and cuts deep sleep and REM sleep^[11].

Make sure you buy the jersey version. INSEN also sells a C-shaped pillow with a velvet cover and other pillows with cooling Tencel covers^[12]. The one BabyGearLab tested, and the one we link to, has the jersey cotton cover^[1,2].

It doesn't smell. BabyGearLab rated every pillow for smell, because heightened sensitivity to smells was common among its pregnant testers. Most pillows in its test had no smell at all. The two exceptions were both foam-filled pillows, and the INSEN wasn't one of them^[1].

Both layers zip off, and BabyGearLab says the whole pillow can go in the washing machine. Its care notes say to wash the cover in cold water and tumble dry it on low, and the insert can be washed in cold water and tumble dried on low as well^[1]. The listing says the outer cover and the inner lining each have their own zipper so you can take them off to wash^[2], and BabyGearLab found the long back zipper made the cover easier to wash^[1].

BabyGearLab scored it 8 out of 10 for ease of cleaning^[1]. Unlike the Momcozy's cover, which BabyGearLab says to hang dry, the INSEN's can go in the dryer on low. INSEN also sells replacement jersey covers made for C-shaped pillows^[12]. A spare means you're never without a cover when one is in the wash.

The C folds into more useful shapes than a U. BabyGearLab says it can be folded, wrapped and stacked to sit upright, and that a C can curl around your waist for extra support while breastfeeding^[1]. Sleep Foundation adds that a C can be folded in half to support your stomach, back, knees or shoulders^[10]. For night feeds, the NHS describes lying on your side with pillows behind your back, which it suggests after a cesarean, and asks you to keep your head pillow away from your baby's face^[13]. The long side of the C makes a good back support for that.

Curled around your waist, it's shaped like a nursing pillow, so treat it like one. Support your own body with it, then move your baby to their own sleep space. The CPSC says never to use nursing pillows for infant sleep or lounging^[14]. The AAP warns against using products that aren't made for infant sleep, and says the crib should contain only a fitted sheet^[15].

Buy the INSEN if you run hot, feel trapped in a U, or want one pillow for sleeping, sitting and feeding. It's BabyGearLab's best overall pregnancy pillow, with an overall score of 82 against 64 for the Momcozy U, and some testers swapped back to it in the middle of the night while they were supposed to be testing its rivals^[1].

Skip it if you need your belly and back held at the same time. A U does that. The Momcozy is the budget U, but its velvet cover runs warm^[1]. The Queen Rose is Babylist's best overall pick^[5], with a cover sold as cooling, though that claim hasn't been independently tested.

If you want a pillow you'll keep using long after pregnancy, a straight body pillow such as the Coop Adjustable or the Snuggle-Pedic takes the least room. BabyGearLab found straight pillows struggle to cover your front and back and shift once you move^[1], which is where the INSEN's curved ends help.