Many listings feature spandex blends and stretch-knit constructions, including 4-way stretch or breathable stretch-knit fabrics. Overall these pieces offer moderate to high stretch and good freedom of movement for everyday wear and active use.
Thermal options are described as midweight and often fleece-lined for added insulation. Some styles also incorporate moisture-wicking fibers and quick-drying construction to provide warmth without excessive bulk.
Maternity styles use soft stretch-knit fabric and an adjustable ruched waistband with functional side ties, allowing the waist to expand and provide customizable support as the bump grows while maintaining a relaxed wide-leg silhouette.
Common details include cable-knit textures, drawstrings or tie accents, side pockets, satin side taping and bows, embroidered script or patches, and elastic or drawcord waistbands.
Some thermal and active styles explicitly note moisture-wicking fibers and quick-drying fabric, which are intended to move moisture away from the skin and speed drying for more comfortable activity.