It's the detachable sleeves and snatched waist for me! This one here is so Jackie O! So feminine and flirty. It features a tie back, pockets, elastic waistband, and a matching mask! 100% Rayon. While there is stretch in the waist due to an elastic waistband, this piece does not stretch. Model is wearing a medium. 34G/33" Waist/46" Hips. 5'5". Sleeves have 4 buttons/loops to wear with or without.