Pen case that fits a field notebook

A pen case made from 100% cotton **No. 10 paraffin waterproof canvas**. **++About the water repellency of the "Pure Cotton No. 10 Paraffin Waterproof Canvas" used for the main material++** https://www.youtube.com/shorts/Lfetja_Lu2g This material is highly durable and may feel stiff at first, but it softens and conforms with use, allowing you to enjoy its __aging process__. The product will have creases (white lines) from the sewing process. This is a characteristic of the paraffin coating and not a defect in the material. The zipper is a **YKK 3 coil**, and the **elastic cord, which is a design feature, is also a reliable industrial product**, ensuring __long-lasting quality__ without easy deterioration. https://live.staticflickr.com/65535/54795476673_31865fa1bb_w.jpg The product measures a practical __20cm in height and 13cm in width when folded__. The two zippered pockets on the left are free spaces, allowing you to store accessories like erasers and pencil lead cases, as well as 16cm rulers, in an organized manner. The right side can hold up to two field notebooks (also sized to fit A6 notebooks). **Note: The notebooks and stationery, such as pens, used as reference items for storage are not included.**