The straps are elastic; Information on the Model Bust: 83 cm Waist: 62 cm Hips: 92 cm Height: 176 cm The model wears a size 36 product. Main fabric: 55% VISCOSE 45% Polyester Product Features: Length: Midi Lining Detail: Unlined Product Type: Dress Collar: V-neck Sleeve Length: Strapless / Sleeveless Gender: Female Thickness: Thin Pattern: Patterned by itself Brand: LCWAIKIKI Fit: Standard