and it's built to take a beating outdoors — it holds up against rain

This is a concentrate for DIY marker refills

you'll also find an eraser at the top (which is also refillable)

refillable marker for broad strokes

moleskine classic large notebook hard cover squared Idwrap and it's built to takeA precise 5 x 5 mm graph grid hardcover notebook for engineers, financial analysts, software developers, and architects who need clean geometric structure for wireframes, data plots, and technical calculations. The grid lines print in a discrete muted tone that guides without overpowering ink work. Rigid leather grained black hardcover opens completely flat at 180, 70 g m acid free ivory paper, 240 numbered pages. Format: Large A5 equivalent (13 x 21