Our proprietary triple-bonded construction is lightweight, with minimal bulk, compared to traditionally-sewn waterproof bibs. It features an ultra-stretchy, durable face, with fully-windproof and waterproof protection from the harshest weather. The S2 is meticulously-engineered to adapt to wild weather swings, with two-way water-resistant underarm zippers for venting, an adjustable hem and wrist cuffs to seal out rain, and reflective elements for low-light visibility.