Specifications: Project Type: Outdoor Material: Plastic+Paper Size: 7.6X12.7cm/3x5 inches Features: 1. [Stay organized, no matter the weather] Don't worry about your notes getting ruined by unexpected weather. Our waterproof notebook is designed to be waterproof, sweat-proof, grease-proof, mud-proof, and even washable. Your notes will remain safe and clear, allowing you to capture ideas, inspiration, and memories without worry. 2. [Useful and Reliable] Made of innovative and sturdy stone paper material, our mini sketchbook is a microcosm of durability and reliability. Say goodbye to the problem of tearing or curling the book's pages. Whether you are a jet-set traveler or a busy student, our small notebook is designed to be your loyal companion for all adventures. From busy city streets to rugged outdoor activities, these pocket notebooks will protect your precious notes and ideas. 3. [Eco’s Choice] Our stone paper notebook is an eco-friendly alternative to traditional paper notebooks. It is made from sustainable and renewable resources, helping to combat deforestation and reduce the demand for wood. By choosing our logs, you can help reduce carbon emissions by 60%, making it a truly eco-friendly choice. Embrace the future of writing that has a positive impact on the earth, one line at a time. 4. [Compact and Lightweight] The size is 3 x 5 inches, with 100 pages per 50 sheets. These 3 small spiral-bound notebooks are perfect for placing in your pocket, purse or backpack without adding unnecessary bulk. The compact and lightweight structure makes these mini sketchbooks the perfect travel companion, allowing you to easily carry them wherever you go. These small 3x5 notebooks are a unique gift for outdoor enthusiasts, travelers, hikers, campers and anyone who likes functional and practical gifts. 5. [Rainy Notebook] Compatible with all weather pens and pencils, it can write clearly and confidently even in the rain. Ballpoint pens and permanent markers work well when the paper is dry, while water-based ink forms beads on the foil. But that's not all - the real magic lies in the transparent touch of mineral stone paper, which provides an unparalleled writing experience. Feel the smooth gliding of the pen on the page and pay attention to the absolute pleasure. Please note: Due to differences in lighting and screen, the color of the item may be slightly different from the picture. 2. Please allow 1 to 3 centimeters difference caused by manual measurement.