Women's BOC Halena Flip-Flops The b.o.c. Halena is a women's flat thong sandal built for all-day warm-weather wear. Multiple straps across the vamp include a woven textile center band and smooth synthetic outer straps, creating a layered fit over the foot. The footbed delivers 6mm of foam cushioning with added arch support, and the flexible outsole uses Flextra construction for high traction and durability throughout the day.