- Waterproof & All-Weather Design
- Write in Rain, Snow & Underwater
- 14 Reusable Grid-Ruled Sheets Includes 1 Protractor
- Durable Polymer Composite Material Compact A6 Pocket Size
- Compatible with HB Graphite Pencils
- Easy to Erase & Reuse
- Resistant to Water, Abrasion & Chemicals
- Ideal for Military, Tactical, Camping & Field Work