Oh, how funny you should say that my bag is larger than I am. In fact, I am wearing the bag in question, and my head, arms, and legs are unencumbered, but I see how you could make that mistake.
And no, I am not planning any sort of hiking excursion, mountain climbing adventure, or camping trip in this weather. It is quite a large bag, but I am just picking up parcels and transporting them to various locations. Could you sign for this one please?