The single unit.
Instead of being shorts and undershorts, the Alp-X Pro 2-in-1 Shorts from Gore are a single unit where the bib straps are connected to the shorts, making them extremely lightweight and unfussy. No waistbands to get in the way, no exposed back, no tearing of road-specific Lycra.
The chamois that Gore uses here is their Alp-X Pro Men’s insert. It has been specifically designed for long and demanding off-road rides. Using a 3D construction to enhance moisture management, the shape with the central channel accommodating the male anatomy will increase bloodflow and reduce the possibility of getting numb. It is a super-high density insert that has padding specifically placed to provide the ultimate protection and cushioning support.
The outer shorts material is a highly functional mix where you have abrasion-resistant material around the inside of the leg, the saddle area, and the sides so that you will be protected from the occasional crash, and you won’t have to worry about snagging delicate spandex when you plow through some branches. Splash-resistant fabric on the back will protect you from getting soaked on wet or muddy trails, and mesh inserts in the front and back of the outer shorts provide the ventilation to help air things out. And a side mesh pocket will give you a place to stash your energy bars or gel packs for easy access.
The bib straps are a full mesh construction to prevent you from overheating by making it easy to ventilate. A radio pocket at the back of the uppers has been provided either for race situations, or so you can have your iPod there when you are training. Reflective logos have been placed on the back and side, so that you can alert drivers to your presence on the road if you are rolling home late in the evening after a long day on the trails.