Recalls for 165,000 infant sleeper products have been issued by four companies due to suffocation risks. Delta Children, Evenflo, Graco, and Summer Infant announced voluntary recalls on Wednesday, following reports of infant fatalities linked to certain brands of inclined sleep products.

“Infant fatalities have been reported with other manufacturers’ inclined sleep products, after the infants rolled from their back to their stomach or side, or under other circumstances,” the recalls from each company state.

Parents that have purchased any of the affected products are advised to stop using them immediately. The specific products affected are Delta’s Incline Sleeper with Adjustable Feeding Position, Evenflo’s Pillo Portable Napper, Graco’s Little Lounger Rocking Seats, and Summer Infant’s SwaddleMe By Your Bed Inclined Sleepers. Graco’s recall makes up most of the recalled products, with 111,000 affected.

The notices do not specify which brands the fatalities are linked to. A total of 73 infant deaths have been linked to inclined sleep products, USA Today reports, but not from any of the companies issuing these recalls.

In April of last year, Fisher-Price issued a recall of 4.7 million Rock ‘n’ Play sleepers, the largest ever for the product category. The same month, Kids II recalled 700,000 infant sleepers.

Inclined sleep products for infants, even non-recalled ones, conflict with the American Academy of Pediatrics’ recommendations for safe infant sleeping conditions. The Academy’s official recommendation is that infants be put to sleep flat on their backs in bare cribs, bassinets, or play yards.

“For years, we’ve known that inclined sleepers threaten babies’ lives, and tragically, the evidence keeps piling up," Grace Brombach, of the U.S. PIRG Education Fund Consumer Watchdog, said in a statement. “Parents and caregivers should stop using any kind of inclined infant sleeper immediately, even if it hasn’t been included in a recall. All versions of these products put your baby’s life at risk.”

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