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Tread Lite Gear says:
Made from 0.3oz Cuben Fiber with a dyneema X Grid base and finished with dyneema cord, micro cord lock, internal aluminium reflector and a mitten hook for hanging anywhere.
XL version is a tail switch variety with a magnifying lens for a much stronger beam. It will allow operation without removal from the bag like it's smaller cousin. The light unit gives a longer run time than the smaller lantern and takes 3x AG13 batteries which are cheap and readily available. Changing batteries is just a matter of unscrewing the tail cap and dropping them in so easier to do in the field.
Top tip - put the lantern to your lips and puff gently to give the best shape.