80% Nylon / 20% Measurements are Sm overbust 32-34"; underbust 26.5-28" Med 34-36"; 28.5-30" Large 37-39.5; 31-32" XL 40-42; 33-35" It is a tie back to make it easily adjustable and the neck strap adjusts. Fully Lined. Hot Pink, Navy, Red, Aqua, Black & Coral