This document discusses factors to consider when designing effective lending products for microfinance institutions (MFIs). It emphasizes the importance of understanding borrowers' cash flow patterns and ensuring loan terms match these patterns. Loan terms that are too short or long can cause repayment issues. The document also discusses different types of loans (working capital vs fixed asset), appropriate loan sizes, repayment frequencies, and collateral options for MFIs since traditional collateral is often not available for low-income borrowers. Group guarantees, frequent borrower visits, and potential public embarrassment are presented as alternatives to traditional collateral.