Clothing in anime follows certain predictable guidelines. Female characters wear as little clothing as possible, regardless of whether it's socially or meteorologically appropriate. Any female with an excessive amount of clothing will invariably have her clothes ripped to shreds or torn off somehow. Whenever there is a head wind, a Male character will generally wear a long cloak which doesn't hamper movement and billows out dramatically behind him. All anime characters are resistant to extremely cold temperatures, and do not need to wear heavy or warm clothing in snow.
Bikinis render the wearer invulnerable to any form of damage.
Anime characters can pull practically any simple object into the real world from a mysterious dimension called Malletspace or Hammerspace. This does not pertain to hentais. The said character will always get clobbered first by character of opposite sex. This is possibly related to the Law of Variant Temporal Dimensionality.