The BAK-PAK ULTRA Long Spine Immobilization Board has all of the same design features as the BAK-PAK, but is thinner and ligher. Weighing only 10 pounds, the board is just 3/4 inch thick and load tested to 1,400 pounds. The BAK-PAK ULTRA board works as well with adults as with pediatric patients; does the job just as well in rough terrain as in rough water; and provides needed rescuer featuers eitout sacrificing patient comfort.