I personally would choose what you think is a nice name, without trying to stuff UL lingo in there. If you gotta preach in the name then I'd keep it indirect and clever like Gossamer Gear. Names like Ultralight Adventure (ULA), Hyperlight Mountain Gear, Prolite etc seem more like descriptions of their products that a real name IMO. Then again, this is just for a class and not a real business so maybe you want to be more obvious.
My suggestions are: Red Lupine Packs, Yarrow Equipment, Stafford Outdoors.