The Heyburn Bib is a high-performance, lightweight 3-layer shell engineered for demanding backcountry conditions, featuring a 30k/30k waterproof and breathable membrane and PFAS-free DWR to keep you dry no matter how crazy the snow globe’s going. Designed with a streamlined, function-first approach, it’s made with a soft yet durable 100% recycled nylon paired with a NASA-developed Trizar® ™ backer that reflects body heat when you're cold and release excess heat when you're working hard—keeping your temp just right all day long. A stretch panel at the back improves comfort and fit, while light mechanical stretch throughout ensures you can move freely on the skintrack or descent. Thoughtful features include side leg zips for easy venting and drop-seat access (and for peeing in the wild), a thigh pocket with internal beacon attachment, and a chest zip pocket with low-profile key clip for secure, bounce-free storage. We heard customer feedback and adjusted the sizing down for this season, resulting in an ideal ergonomic fit. Founder Notes: The Heyburn bib now fits true to size. I'm traditionally size large in pants and wear a size large in the Heyburn bib this szn! Erin (pictured) in the lapis is a traditional size XS and wears an XS.