Whoah. Everythin else is fine, but, there's just one part that I can't really approve. I don't think it's, even within One Piece level of reasoning, possible for a web string to have the potential to weight a massive 100 tons. Aside the fact that this would mean that the user would have to be impossibly powerful in terms of brute strength, to levels that potentially dwarf even giant's power level or more, such weight would easily crush just about anyone. Not to mention that I doubt that any sort of web material, however dense, can really weight so much.
Please remove this or edit it to levels that are reasonable and/or make sense, and if you want this to be heavy, remain to logical levels. It doesn't have to be heavy to be durable, after all. Don't forget that.