STX 100% Nylon ™ WP 20,000 / 20,000 M.V.POur best shell trousers with very high breathability that combines extreme functionality with perfect comfort. The garments are windproof and waterproof with taped seams. The trousers have ventilation solution on the thigh in the form of rubberized zippers. All zippers are YKK and trousers also have a leg. For the best comfort, form-fitting pants at the knee and reinforcement on the inside of the ankles and gaiters. The pants are a great expedition garments and has been tested on Mount Everest 8848 m above sea level The trousers have evolved over five seasons Saran Subba, one of Nepal's most experienced mountain guides.