An ankle brace is configured with a lateral anterior talofibular (ATF) strap and an inversion control strap affixed to a non-rigid brace body coupled to a semi-rigid orthotic arch support. The brace may be quickly donned and doffed by a wearer, and provides prophylactic or post-injury support to the ATF ligament without unduly restricting the wearer's motion. As a result, the wearer may participate in physical activity without significant impairment in range of motion.