sleepsack

A sleepsack is a wearable blanket designed primarily for infants, combining the warmth of a blanket with the safety of fitted clothing to reduce suffocation risks in cribs.

The design typically features armholes or sleeves with an enclosed bottom, keeping babies warm without loose bedding.

Adults use sleepsacks too—in camping as a lightweight sleeping bag liner, or in BDSM contexts as a full-body restraint garment that restricts movement.