Modular Over Bags represent a new departure in sleeping bag technology.  Built of the same materials as the Base Bags, but they literally come apart to perform many tasks...and constitute the framework for the System's name; Regulator.
Purchase them in separate sections, or as a complete stand alone bag.
In stand-alone bag mode, the ventilation is amazing - horizontally, at both the waist and the feet, and arm holes as well.
Three sections: Upper, Mid and Foot are all available separately.

Function
1) As a complete unit--all three sections zip together as a fully-functioning sleeping bag in their own right, right down to draft collar.

2) As an Overbag
Sections can be attached to a Base bag as a temperature enhancer in the old-style "overbag" approach.
 Thanks to the revolutionary three-part nature, only the "part" needed for a given mission need be carried - letting you add insulation where YOU need it - foot, lower body or upper body/torso (or all 3).
Click here to see how our Sections bring a Base to 50 below!

3) Upper & middle sections as garments
Wear the Upper Section as your sole insulated upper garment, then add the Mid Section to create an insulated cagoule.
Leave your parka and/or insulated pants at home. The "overbag" function is addressed with a net weight savings on carried gear, instead of the old net gain, because one's day-time garments can be left behind in favor of the double duty of the MOB.

Click here for weights and dimensions.

MOB Complete
regular 40°: $491.00 long: $506.00
regular 20°: $553.00 long: $570.00
regular 0°: $599.00 long: $618.00
regular -20°: $675.00 long: $697.00

MOB Components