How do i get her to wear my hoodie?

kay so im in an all girls school and im goin into 4th year. i love a girl in my year and we have a lot of history. my year is going to delphi in october (its an adventure center). were staying there for 4 nights and its bound to be cold out one night. ill make sure im near her in order to suggest it but how do i suggest to her that she could wear my jumper that ill be wearing. i know she gets cold very easy and i can handle cold weather as ive played football matches in the lashing rain before so how do i suggest in a "friend way" that se could wear my jumper and possibly keep it <3