The original C-shaped body pillow that started the whole category, and still the one most parents tell their pregnant friends to buy.
The Snoogle's single-piece C-shape supports your head, back, belly, and knees at once, which is exactly the side-sleeping alignment the AAP recommends for later pregnancy. It's firmer and more supportive than the flatter U-shaped clones, holds its shape over months of nightly use, and the removable cover machine-washes easily. It does hog space in the bed, so if you share a full or queen with a partner (and a dog), the wider U-shapes or a wedge may keep the peace better. Skip it if you run hot, since the dense polyester fill traps heat, or if you're very petite and find the fixed curve doesn't line up with your frame.