The shirt idea sounds really good! Also any material you use should be rip stop sorta stuff? I've got cloths that I'd like to wear riding but I don't because i'm worried about wrecking them from falling off or mashing trousers in the chainring. Even though i've got a bashguard, baggy jeans can still get caught up in the tyre etc and easily rip. I think if you just design general clothes but adapted for bike riding, you'd be onto a winner. With rip stop stylish material and all that. I don't think things like back protectors are going to be a huge seller in trials, or things like full leg pads, it's like trying to ride in a full face helmet. I used to wear shin pads etc while riding and it just got in the way. I much prefer just riding in a helmet these days as: 1) it's cooler 2) Looks better, riding round town all padded up looks pretty ridiculous 3) Looser/free to move easier So if I was you, i'd concentrate on clothes, shorts and shirt as even in the winter you can easily get warm. Maybe a riding jacket too? Cheers Rob