Heart pajama bottoms are commonly made from polyester blends and cotton. Examples in listings include 92% polyester/8% spandex; 95% polyester/5% elastane; rayon/polyester/elastane blends (48% rayon/47% polyester/5% elastane and 61% polyester/36% rayon/3% elastane); and occasional 100% cotton options.
Waist styles typically include pull‑on elastic bands and adjustable drawstrings. Descriptions commonly note pull‑on constructions, elasticated drawstring waistbands, and specific details like a 1‑inch elastic waistband with a matching drawstring.
Most items advise machine washing and tumble drying. Several descriptions specify machine wash cold and tumble dry low to help preserve fabric and printed graphics.
Sizing is usually listed in women’s sizes, with fits described as regular or straight‑leg. Some items are labeled classic or classic‑rise; adjustable drawstrings allow a more customized fit, and a few lounge shorts use flexible or one‑size‑fits‑all (OSFA) sizing.
Descriptions recommend machine washing inside out or washing cold with like colors and tumble drying low to help maintain vivid prints and preserve the garment’s shape.