Complex sentence: Aubin & Wills was launched by Jack Wills in September 2008 as a sister brand, aimed at more mature customers, age 25 and up, who have recently graduated from higher or tertiary education and are in full-time employment.
Split into simpler sentences: Aubin & Wills was launched by Jack Wills in September 2008 and has been considered as "Jack Wills'" Sister brand. The label is aimed at a more mature customer than Jack Wills, namely age 25 and up, who have recently graduated from higher or tertiary education and are in full-time employment.