Topeak Aero Wdge iGlow Strap. Popular Aero pack combined with super bright iGlow technology for safety at night and low visibility conditions. Simple and secure strap mounting system. 1000 Denier Teflon coated fabric. Constant or blinking modes. Burn time: 50hrs. Batteries: 2x CR2032 (included). Small: 15×5. 5×15 cm, 120g. Medium: 18×8. 5×11 cm, 145g.