When sourcing Ladies Bikes, prioritize Step-Through frames (Low-Step) which offer ease of mounting and dismounting, especially for urban or commuter use. For materials, 6061 Aluminum Alloy is the industry standard for balancing lightweight performance and cost-effectiveness. For high-end performance models, look for T700 or T800 Carbon Fiber to reduce weight significantly. Ensure the frame geometry features a shorter reach and narrower handlebars to accommodate the typical female ergonomic profile.