BIO Harmonica bag 80x20x240mm 50pcs. An organic compostable bag, perfect for packing reclining products such as cakes, stollen, cakes etc. The harmonica bag I extremely suitable for square products as there is a side gusset (harmonica) on the side, allowing a square figure to fit perfectly into the packaging. The bag has a (length) seal and a (bottom) seal at the bottom. The Natureflex 30 mµ film makes the bag biodegradable and therefore better for the environment.