These are just a simple yet effective, compressible waterproof over trouser. Keep them in your pack for when the sky starts to leak; which it does quite frequently on our little isl&. Made from a 2 layer Drilite fabric that has a hydrostatic head of 20, 000mm, so they will undoubtedly keep you dry. They have full length zips to make life easy when putting them on & taking them off & they have adjustable waist & hems, throw in some articulated knees for unrestricted movement & you have one fine pair of overtrousers. 2-layer DRILITE® Plus fabric Articulated knees for exceptional freedom of movement 2-way YKK® full length side zips for ease of fitting Adjustable elaticated waist Adjustable hem For all you kit geeks out there, the links below will take you to Mountain Equipments Information pages where they will explain this items different fabrics & constructions techniques in greater detail. Drilite Most people are too scared or do not really understand the importance of washing their equipment in the correct manner, all equipment needs to be maintained properly for it to perform. It is actually really easy! Feel free to give the shop a call from 09:00 until 17:30 Monday to Saturday (19:30 on a Wednesday), as we are always happy to help & give friendly advice. Or if you are reading this outside our normal opening hours here is a useful link to Trekitts recommended product for washing & caring for kit. Nikwax Tech Wash Nikwax TX-Direct I hope this helps.