Maternity Shapewear Soft Seamless Pregnancy Belly Support Underwear for Dresses Our maternity underwear is made of nylon and spandex which is twice as strong as regular cotton and way softer and more luxurious due to its extra-long staple fiber. These mid-thigh pregnancy shapewear belly support bands seamlessly hug your body in a way that's similar to women's spandex shorts for thigh shaping or high waist shapewear boy shorts for women, but its fabric design allows for more mobility and breathability. Seamless design for smoothing, a blend of nylon and spandex. Belly support and butt lifts, the polyamide fabric provides gentle support and a relaxing comfortable fit. These pregnancy must-haves shapewear panties have featured a seamless, breathable polyamide fabric with our unique integral support panel for maximum support and comfort. It is the perfect, all-in-one belly support for pregnant women!