Whatever the weather, with this Outlines waterproof notebook you’ll always be able to read what you’ve written. That is because it is made from the same non-coated, durable, wet-strength paper that is used to produce nautical charts. It is an utter pleasure to write on, and the heavy 150 g/m² quality paper is as durable as it is smooth. When the pages are dry, write away with any tool- ballpoint, fountain pen, gel pen, whatever tricks your fancy. If you are writing while out and its lashing, the good folk at Leuchtturm recommend you use a pencil.  also features additional useful extras like a global time zone map and conversion tables for popular units of measurement. SO whether you are up on your boat, out on a hike or standing at the bus stop - if you need to sketch, write or scribble - you can do so whatever the weather with your Outlines notebook. And of course, it has all the beautiful features of a Leuchturm notebook, like an expandable pocket, for collecting and keeping safe mementos, receipts or snacks (probably not snacks). There are not one but TWO fabric page markers so you'll never get lost and an elastic band fastener ensuring loose notes don't go astray and keeping those closed kept plans secret. Thread-bound book for durability and opens flat, which is fantastic for writing in and ensuring 100% page usage. Acid free paper, which makes it perfect for archiving important thoughts and notes, lasting years without yellowing or any degradation. Ink proof paper so you can use your favourite fountain pen without worrying about it going through the paper. Also includes stickers for labelling and archiving. And also some additional useful extras like a global time zone map and conversion tables for popular units of measurement. For more Leuchtturm notebooks check out the full collection at designist. For stationery addicts, we have a full collection of lovely things here at designist. What size is it?Softback, B6 notebook