This ultra-thin membrane is exceptionally waterproof and breathable, making it a great choice for use in Spyder ski jackets and pants. Additional benefits inlcude its lightweight construction, and stretch recovery which helps maintain the integrity of the garment throughout it's life. These materials are also very durable, ensuring that your Spyder gear will function at like-new levels throughout seasons of use. The Xt.L lamination is a proprietary Spyder technology, and can only be found on Spyder brand products.