EJ – The most common Power Stretch hard-face option is #7767 (60% polyester, 30% nylon, and 10% Lycra) versus the most common soft-face option # 7622 (94% Polyester & 6% Lycra). I only use the soft-face version for the following reasons:
1. The soft-face stretch is 100% width and 100% length versus only 60% width and 60% length for the hard-face.
2. The soft-face clo is .975 versus .953 for the hard face.
3. The soft-face air permeability is better (210) versus the hard-face (163).
4. I already carry a windshirt and it addresses the abrasion resistance and wind blocking requirements when needed.
I have tested the #7774 Wind Block version but not the Wind Pro. I only use my Wind Block for around-the-city wear. The clo is great at 1.275 but it is very heavy at 9.9 oz per yd. In addition the integral wind proof membrane is redundant with the function of my windshirt.

