LISWIC Women's Level 3 High Impact Zip Front Sports Bra 92% polyester You will get one 5.5 inch waterproof Sports and Running Armband case as free gift ! (note:sport bra with black color has no this gift. ) Please refer to our size guide image as shown on the left before placing orders Runs small even if choose according to LISWIC SIZE GUIDE? It is OK, because your "sisters" need more support during high intensity activities. If you do not like it to be tight, please choose a larger size. Shell fabric: 92% polyester (50% CoolMax), 8% Lycra. Breathable, Extra-strong support (level 3) Cups: 2-ply, cut&sew, wirefree; Straps: non-adjustable; front : Zip front closure Easy on and off with secure full-length front-closure zip bra,auto-lock zipper sliders A - C cup is extremely high level support; D cup or larger is high impact support. Good for high impact activities: running, xc, basketball, vollyball, tennis, etc.