Lightweight, packable, waterproof and breathable GORE-TEX® pant, designed for maximum mobility. Designed for take-along emergency use when the weather takes a turn for the worse. Beta Series: All-round mountain apparel   SL: Super Light.  http://www.arcteryx.com/product.aspx?country=nz&language=en&gender=Mens&category=Pants&model=Beta-SL-Pant
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