They have heavier weight paper than notebooks

Set #2 includes Dark Gray

When taking your TRAVELER’S notebook on the go

Knurled twist top

Field Notes Expedition Memo Book Set of 3 red They have heavier weight paperVirtually Indestructible The Field Notes Expedition Edition features a hi visibility Antarctic Survey Orange front cover and a Polar Night Black back cover, with a subtle varnish effect featuring a topographic map of Antarctica. The body pages feature Dot Graph graph paper, printed in light gray. The whole book is printed on Yupo Synthetic paper, an amazing water and tearproof paper extruded from polypropylene pellets in Chesapeake, Virginia. Set of 3