GeekVape Boost coils (B Series) are mesh-style replacement coils for Aegis Boost devices, using FeCrAl mesh and cotton for rich flavor, available in resistances like 0.4ohm (DTL) and 0.6ohm (MTL) for different vaping styles, designed for both freebase and nicotine salt e-liquids, and known for good flavor depth, coil life, and high-power performance in specific versions