User blog comment:Roranoa zoro/D.F. USERS SWIMMING!!/@comment-1820651-20101222023056

why does DF users cant swim:

1. cant use haki on themselves(when marco got caught with sea prism stones)

2. your power wears off but doesn't cancel it's users ability(when luffy's fighting arlong)

3.DF + Haki = Invincible