For the 'ASOS DESIGN slash neck mini dress in black' in size S - US 4-6, find its care instructions and material composition. Additionally, identify the main benefit of signing up for ASOS Premier regarding shipping for US customers.
Navigate to the product page for 'ASOS DESIGN slash neck mini dress in black'. Select the size 'S - US 4-6'. Expand the 'Look After Me' section and extract the care instructions. Expand the 'About Me' section and extract the material composition. Navigate to the ASOS Shipping & Delivery policy page (e.g., by clicking 'Delivery & returns' from the footer). On the Shipping & Delivery page, identify the primary shipping benefit for ASOS Premier USA members. State the care instructions, material composition, and the main ASOS Premier shipping benefit.
The selected size is 'S - US 4-6'. The care instructions are stated as 'Machine wash according to instructions on care label'. The material composition is stated as 'Main: 95% Cotton, 5% Elastane'. The main ASOS Premier shipping benefit is stated as 'unlimited Express Delivery on orders of $50+' and 'Standard Shipping on all others over $20!'.