If I used this as a top layer and had something like a Mountain Hardware Alchemy underneath, would it be safe to say I'd be staying pretty dry under nasty conditions? Would I in turn be sweating like crazy with this layering system?

Tech Specs:

Material:

55% Polyester, 45% recycled polyester ripstop 

Waterproof Rating:

Not specified 

Breathable Rating:

Not specified 

Core Venting:

Underarm zips 

Pockets:

2 Front 

Seam Taped:

Yes, fully 

Powder Skirt:

No 

Hood:

Yes 

Zip-in Compatibility:

Yes 

Recommended Use:

Hiking, backpacking, skiing, mountaineering 

Manufacturer Warranty:

Lifetime