Module:
Crafting -> Tailoring -> Bag.

Category:
Crafting.

Loottable:
https://classic.wowhead.com/item=10050/mageweave-bag
https://classic.wowhead.com/item=10051/red-mageweave-bag

Items:
Item ID# 10050
Item ID# 10051

Additional context

Hi. According to AtlasLootClassic-v1.1.8-beta-classic, training for Mageweave Bags starts at Tailoring 240. But Classic wowhead is showing the normal Mageweave bag starts at 225 and the red one starts at 235 from the recipe. Currently these two numbers are missing from the current release of the addon.

Sources:
https://classic.wowhead.com/item=10050/mageweave-bag
https://classic.wowhead.com/item=10051/red-mageweave-bag

Thanks! fixed for next version.
Think I have to do more fixes of the start level from tailoring :D