What is the difference between T1 and T2 and T3 Werkpants?

The main difference between T1 and T2 Werkpants is that T2’s are a heavier material that is warmer, more water resistant and abrasion resistant. The T1’s are a lighter material that is ideal for warmer climates while the T2’s are a three season pair of pants. The T3’s are a pair of T2’s that are fleece lined, built for winter conditions.