Abstract: A sleeping bag extends from a lower end to an entrance end and includes first and second halves arranged in opposing relationship with one another to define a sleeping compartment therebetween. A draw cord extends circumferentially through the first and second halves in spaced relationship with the entrance end to define a collar portion of the sleeping bag disposed between the entrance end and the draw cord. The draw cord is adjustable to vary an opening defined by the collar portion for permitting the collar portion to be adjusted around a neck of a user of the sleeping bag assembly. Additional thermal protection for the sleeping bag is achieved by the incorporation of the collar portion with a unique internal adjustment mechanism that permits the circumference of the opening of the collar portion to be changed while at the same time maintaining insulation thickness.

Abstract: For any given thickness of thermal insulation, the usable lower temperature range of a sleeping bag assembly may be extended by constructing it using an inner lining material that in addition to its normal functions of being flexible and capable of retaining insulating materials, is also capable of functioning as a vapor barrier and a radiation barrier. In addition to the standard sleeping bag design approach of incorporating various insulating materials to reduce heat lost by thermal conductivity, the subject disclosure is directed to methods by which heat loss by radiation and evaporation may also be reduced.

Abstract: Methods, devices and systems are provided for detecting drowsiness or the alertness level of a driver of vehicle. A driver's heart rate variability level is determined based on signals received from one or more sensors placed in the vehicle, such as biometric sensors located in a seat assembly. In response to a low heartbeat variability indicating a drowsy or non-alert driver, one or more output signals may be generated to warn or notify the driver.