Lifetime Waterproof Guarantee with the new ProQuip Stormforce PX5 Waterproof Trousers. One of the most technologically advanced trousers produced by the brand to date, and manufactured from an exclusive fabric that comes with a lifetime guarantee! The PX5 Trouser is extremely lightweight, a silky soft to touch fabric yet ideal to wear in adverse weather conditions. A four-way stretch enhances mobility, and the swing silent technology reduces any noise distraction when moving.