There seems to be a new trend in clothing related to protecting yourself from the sun and damaging rays. Clothes lines are coming out the claim to be SPF rated, I've even seen the SPF referred to as Sun Protection Fabric. This is a scam, so make sure you don't pay any additional for this "feature". Unless you are planning on parading around in a sheer negligee, clothing already has very high sun protection. Don't believe me, just look at your tan lines. You get tan lines because the sun does not get to your skin beneath your clothes even when they don't have a fancy SPF marketing label attached to them.