Jumper and Amber were jumping in southern Utah. Amber was doing her first wingsuit base jump. She had a good exit and was stable but did not build up much foreword speed and was not out flying the tallus. She must have lost altitude awareness. She reached back to pull around 15 seconds in to the flight but was much too low and impacted before she threw her pilot chute. This is a big loss to everyone who knew Amber. Our thoughts go out to Amber's family and Jumper. Please try to stay safe out there everyone