Kryptek has designed and built a fantastic early season, warm weather lightweight hunting pant called the Valhalla. I tested the Valhalla in the heat of the North Florida archery and muzzleloader seasons.
Without a doubt they were the most comfortable warm weather hunting pants that I have ever worn.
Kryptek describes them as follows:
Simple, functional and perfect for the minimalist outdoors man. Kryptek's Valhalla pant is lightweight and breathable giving you the flexibility you need to conquer most Spring, Summer and early Fall conditions. Designed for high exertion to mild-to-hot conditions.