Common fabrics include cotton and polyester, plus plush or minky fleece and microfleece (sometimes with a silky outer layer). Some listings also list small amounts of spandex or elastic in the fabric content.
Size availability varies by listing: many sets range XS–XL, while others extend from S up through 3X. Product titles commonly list M, L, and XL as well.
Most holiday pajama bottoms are pull-on styles with elastic waistbands—either a full elastic waistband or elastic at the waist—designed for a comfortable, loose to semi-loose fit.
Most listings recommend machine washing and tumble drying. Some item descriptions specify machine wash cold and tumble dry low.
Family matching sets can vary: some tops are button-front with chest or front pockets, while pants may have side pockets. A few listings explicitly note that the top has no pocket.
Most women's holiday pajama sets are two-piece combos (a top and matching pants). Some minky-fleece styles also include matching cotton socks, and many family-themed items are sold as individual two-piece sets rather than multi-person packs.
Fleece and minky fleece are described as plush and toasty for extra warmth. Microfleece-lined sets are marketed as soft and cozy, while 100% cotton sets are presented as more breathable and comfortable for milder conditions.