Flotation collar

A flotation collar comprising:

• an exterior cover;
• and
• a bladder residing in the exterior cover, the bladder comprising:
• a neck portion;
• a right lower portion below the neck portion;
• a left lower portion below the neck portion;
• a first cell residing in the neck portion, the right lower portion and the left lower portion;
• and
• a second cell residing in the neck portion, the right lower portion and the left lower portion,
• wherein:
• in the lower portions, the first cell substantially retains a first intended inflated volume of the first cell if the second cell is not totally inflated, and the second cell substantially retains a second intended inflated volume of the second cell if the first cell is not totally inflated, thereby retaining a roll-over feature if one cell deflates;
• and
• in the neck portion, the first cell is expandable into substantially all of a first volume otherwise occupied by the second cell, if the second cell is deflated, and the second cell is expandable into substantially all of a second volume otherwise occupied by the first cell, if the first cell is deflated, thereby retaining the ability to carry a wearer with head above water and providing a layback angle for the wearer.

A flotation collar comprising:

• an exterior cover;
• and
• a bladder residing in the exterior cover, the bladder comprising:
• a neck portion;
• a right lower portion below the neck portion;
• a left lower portion below the neck portion;
• a first cell residing in the neck portion, the right lower portion and the left lower portion;
• a second cell residing in the neck portion, the right lower portion and the left lower portion, and
• a baffle partitioning an interior of the bladder into the first cell and the second cell,
• wherein:
• in the neck portion, the baffle divides the bladder into two substantially equal halves, and the baffle width in the neck portion is approximately equal to one half of the circumference of the bladder in the neck portion;
• and
• in the lower portions:
• the first cell is approximately fifty percent bounded by the bladder back, approximately twenty five percent bounded by the baffle, and approximately twenty five percent bounded by the bladder front;
• and
• the second cell is approximately fifty percent bounded by the bladder front, approximately twenty five percent bounded by the baffle, and approximately twenty five percent bounded by the bladder rear.