These pants offer high stretch and provide all-around support for trekking. They have been redesigned with a clean, straight silhouette, eliminating the V-shaped gusset in the crotch. The material has a moderate thickness, providing wind resistance and moderate insulation, making them suitable for a wide range of seasons and uses. Essential outdoor features include water repellency to handle light rain and ventilation on both sides to release moisture. The waist features an easy-to-operate buckle. Size Standard: Japanese Size Domestic Genuine Product Material: APEX Aerobic Light (90% nylon, 10% polyurethane) Weight: 490g (for size L) Country of Origin: Vietnam Clean design without V-shaped gusset Nylon buckle for lightness and increased strength Waist belt made of stretch material *Please see the size chart image for the appropriate sizes. I haven't used them very often, but I have used them for mountain climbing. I think they are in good condition, with no noticeable scratches or stains. I look forward to your comments.