if your after cheap, get down to asda for polo shirts, so cheap u can afford to throw them away instead of bleaching!! but all polo shirts look scraggy looking after a while even if you bleach them or not, you'd need to purchase more expensive ones for longevity for example from Marks and Spencer or the nationwide school shops, my daughters were from marks, they lasted a long time, and instead of bleaching i put all the whites in on a hot wash and put some vanish white in with them, works a treat and doesnt damage the texture of the shirt. You can still use non bio with vanish and my daughters skin is very sensitive and doesnt react to the vanish, so its worth a shot!