When you're digging snow pits and documenting layers you need a ruler that won't roll up or bend on you but can be stored in a small space, which is exactly why you need the Brooks-Range 100cm Folding Ruler.
Expanded length: 39.5” (100 cm)
Collapsed size: 5" x ½" x ¾" (12.7 x 1.3 x 1.9 cm)
Chemical, water, and scratch resistant
Molded with 30% fiberglass
Maintenance Free, won't rust or kink
Deep embossed scale on both sides
Metric rulers marked in red every 10 cm
Inch rulers marked in red every 16 in.