I do Muay Thai, and have been looking forward to getting a bit more gear for training. I'm on a bit of a budget at the moment, so I can't afford the expensive leather shin guards. I've been looking at the much cheaper shin guards, the ones made of "fabric and foam", and tend to cost between $10 - $20. Are these worth it? My guess is they'd only be good for light sparring, but I kind of need some sort of shin protection for one of the classes today, which supposedly is gonna be a bit "tougher." Thanks for any advice.