Translation of "Lightweight" in Russian

Overseas, best laptops that are lightweight.

за рубежом, лучшие ноутбуки которые легки.

This carbon fiber bicycle is incredibly lightweight.

Этот карбоновый велосипед невероятно лёгок.

Is somehow too lightweight to be taken seriously.

слишком легкомысленно и несерьёзно.