A complete sourdough-starter proofing system that keeps your starter warm, stable, and active. The bundle includes the Cozy Bread Proofing Mat that delivers gentle, even heat, plus the Cozy Bread Insulation Box that traps warmth and blocks cold drafts. Together they create a controlled environment that supports faster fermentation and consistent results year-round. Easy to set up, compact to store, and perfect for bakers who want reliable starter performance without the guesswork.