Few things feel better than changing into cozy pajamas after a long day. But how often should they be washed? The question sparked online debate after Allison Delperdang admitted on TikTok that she doesn’t wash hers after every use. While some people found wearing the same pajamas for several nights perfectly normal, others were horrified. Experts generally suggest washing pajamas after three or four wears, depending on sweating, hygiene habits, and sleeping conditions.

Pajamas spend hours against your skin, collecting sweat, body oils, dead skin cells, and personal-care products even when they look clean. Regular washing helps control odors, remove buildup, and reduce potential skin irritation. People with sensitive skin, eczema, or acne may benefit from washing more frequently, although detergents, fragrances, and other factors can also cause irritation.

How often you wash your pajamas depends on several factors. Heavy sweating, hot weather, illness, visible stains, or unpleasant odors are good reasons to wash them after one night. Showering before bed and wearing clean underwear may help sleepwear stay fresh, but neither eliminates the need for regular laundering. Cotton and linen can feel breathable, while flannel may be warmer; regardless of fabric, follow the garment’s care instructions.

Washing pajamas after every wear is perfectly reasonable, but it isn’t necessary for everyone. Many people can comfortably wear the same pair for a few nights if it stays clean, dry, and odor-free. To keep sleepwear fresh between washes, hang it somewhere well ventilated, avoid storing it damp, and rotate between several pairs. The bottom line: Three or four wears is a practical starting point, but wash sooner whenever your pajamas become damp, dirty, smelly, or uncomfortable.