Delivering optimized performance for minimal weight, the ultralight Arc'teryx Men's Alpha SL Pant packs small, ready to provide emergency weather protection when needed. N40r GORE-TEX® fabric with Paclite® product technology is waterproof, breathable and exceptionally light. The nylon ripstop face offers some abrasion and tear resistance. Where higher levels of durability are required, Arc’teryx uses hardwearing N150p-X GORE-TEX® fabric. The Athletic fit with e3D patterning maximizes ergonomic freedom.