The shoes come in three models, the top of the line uni-sex X Project 1.0 ($280), and the men’s X Project 2.0 ($210) and X Project 3.0 ($160), which come in vivid green, orange and red colors, respectively. They have a women’s specific version in the X Project 2.0 ($210) and X Project 3.0 ($160) models, which has a corresponding anatomical last, and comes in purple and blue colors, respectively. All the shoes have the exact same performance and power characteristics, and there are just fewer features, increased weight and decreased cost as you move down the model lineup, and they’ll be available in the March 2013 time frame.
The obvious highlight of any of the X Project shoes is their brightly colored translucent soles. The 1.0 uses a combination of TPU and mesh materials, which makes it light at 320 grams and provide good ventilation, so it would suit warmer conditions, while the 2.0 use of synthetic leather would work better in wet and colder environments, and the 3.0 uses a mixture of synthetics and mesh.
The 1.0 uses a fully bonded composite upper construction which is commonly used in running footwear. It has the strength of traditional synthetics that are perforated, but gets the breathability and weight savings by using a single-layer mesh (like a running shoe) and bonding a TPU (thermoplastic polyurethane) skin with a synthetic underneath. This unique three-layer construction has a great strength to weight ratio, with good suppleness and breathability. The 2.0 uses synthetic leather, while the 3.0 uses a combination of synthetic and mesh.
The 1.0 features their padded and fully featured P.R.O. micro-adjustable buckle, which has a low profile, and three side locations for instep height adjustment. The buckle has a long throw lever adjuster arm and push button release for on the fly adjustments, both of which are extremely easy to use. The 2.0 and 3.0 models use their more typical buckle closure system.
The two lower straps are canted 25 degrees back to follow the natural contours toward the lateral side of the foot to help with hot spots and blisters. The well-padded tongue uses a SPR foam (open cell) which is very dense and doesn’t absorb water, and gives good cushioning and protection to help with pressure spots.
The 1.0 and 2.0 uses their semi-custom 1:1 insole system, which has some mild orthotics, and includes a metatarsal pad and adjustment wedges for tuning the arch and varus in the forefoot. The 3.0 model has an insole that only has a metatarsal pad.