I'm a sled dog trail veterinarian and I'm in need of outlayer pants that are wind and water proof. I'll be wearing them over whatever base layers the temperatures and activities dictate so they need to be loose enough to fit over expedition weight tights and fleece pants. Any suggestions?

Tech Specs:

Material:

Stretch twill with XT.L membrane & Spylon finish 

Fabric Waterproof Rating:

10,000 g/m 

Fabric Breathability Rating:

8000 g 

Insulation:

40g Thinsulate 

Side Zips:

yes, ankle 

Gaiters:

yes 

Seams:

critical taped 

Waist:

belt loops, elastic 

Pockets:

2 front, 2 back 

Recommended Use:

skiing 

Manufacturer Warranty:

lifetime