ufg ultimate - polypropylene hard plastic kama - black ufg ultimate's polypropylene hard plastic training made from polypropylene material which is much stronger & durable than wooden or steel weapons, lightweight yet sturdy. polypropylene is virtually a unbreakable material which makes these training weapons the best available while they’re not quite as rigid as wood, they have the advantages of being virtually unbreakable and remarkably stiff and cut resistant