Shirts under leathers/textiles

Hi Guys,

Any tips on keeping your shirts reasonable under bike gear?
I wear a back protector and Leather Jacket.

Trousers I can keep in the back pack, is there a way off keeping a shirt in the back pack without.

Will be buying textiles soon as I get my first par cheque.

thanks a mill

see here

http://londonbikers.com/forums/498436/Bike-Shirt-dilema

thx