The topeak aero wedge iglow pack combines the popular wedge pack with super bright iglow technology for safety at night and lowvisibility conditions topeak aero wedge iglow pack features 1000 denier teflon coated fabric quickclicktrade or strap mounting constant or blinking modes burn time 50hrs batteries 2x cr2032 included small 15x55x15 cm 05l 120g medium 18x85x11 cm 07l 145g