I was recently told that I have an allergy to elastic as well as synthetic fabric - this created a problem because almost every bra has elastic.  I found this product which has minimal elastic and is mainly cotton.  What a great product!!!  My long standing rash around the bra straps and everywhere the elastic touched has disappeared.  Would recommend it alone for that reason, but also it is a great fit.  Whoever designed this product, my hat's off to you.