Common materials include 100% cotton for lightweight, breathable sets; 100% polyester microfleece for warm, cozy options; and softer knits such as Hacci, often used in girls' sets for a stretchy, plush feel.
Most hearts pajama options are 2-piece sets (top and bottoms). Some microfleece styles are sold as 3-piece sets that add fuzzy socks, and a few girls' sets include extras such as a matching scrunchie.
Warm-weather or everyday hearts pajamas typically use lightweight, breathable fabrics like 100% cotton and breathable knits. Cold-weather options use warmer materials such as 100% polyester microfleece and Hacci knits for extra softness and insulation.
Most hearts pajama bottoms are pull-on styles with elastic waistbands. Some adult styles add a functional drawstring or an adjustable waistband for a more customized fit.
Alongside heart prints, hearts pajama options include rainbows, fair isle–inspired patterns, leopard and other animal prints, classic solids and plaids, and a variety of girly or seasonal motifs.
Some hearts pajama sets include extras such as matching fuzzy socks or a scrunchie. Practical touches may include features like two side pockets on the pants.