The material is a thick, stretchy, ribbed material and holds up GREAT! Sizing is somewhat flexible because of how stretchy the material is, but since we know you will ask, here is a GENERAL size recommendation:

S/M 32A-36DD L/XL 38A-42DD

1X/2X- 40DD-44C 2X/3X- 44D-48DD

If you are FULLER chested, you will still fit in these, but they may fit a little bit more compressed. The material stretches great, so if you are in between sizes or larger than a 42 bust, you can size down for a more compressed fit (without feeling uncomfortable!)

***Sold individually, photographed in groups only to show color comparisons***