Materials vary by style. Common blends include recycled polyester/rayon/spandex (e.g., 63% recycled polyester / 33% rayon / 4% spandex), rayon/spandex (95% rayon / 5% spandex), and cotton/modal blends (examples: 58% cotton / 39% modal / 3% spandex and 60% cotton / 40% modal). The maternity rash guard is tricot made from 82% nylon / 18% spandex.
Several tops include built-in nursing access: Henley-style snap plackets for discreet opening, snap placket access from above, crossover layers that allow pull-aside nursing or pumping, and double-layer fabric over the bust for extra coverage while nursing.
Most Isabel maternity tops list machine wash and tumble dry. The maternity rash guard requires gentler care: hand wash and either line dry or lay flat to dry.
Styles are described as a regular fit. Lengths typically fall below the waist or below the hip, with some styles specifically noted to hit below the hip.
Most items are midweight with stretch—many blends include spandex for flexibility. Examples note a soft 2x2 rib knit and other midweight fabrics designed to stretch with movement and a growing bump.