A good map covering the Snowdonia National Park of North Wales as far south as Porthmadog. This is an updated edition that includes all the major climbing crags.
Scale: 1:40,000 with a detailed 1:15,000 mini-map of Snowdon and a 1:25,000 mini-map of Nant Peris (Upper Llanberis) and Cwm Idwal).
Plus lots of other useful information.
In Welsh and English.
Printed on waterproof plastic which is extremely durable and light (less than half the weight of a laminated map - 100g) and are produced in conjunction with Harvey Maps.