what size would be good for someone who is 5'8" and about 135 with a skinny build?

Tech Specs:

Material:

[shell] Nylon dobby weave shell w/ 2-layer Conduit waterproof laminate 

Lining:

CoolMax mesh and nylon taffeta 

Core Venting:

Yes, underarm zips 

Pockets:

2 fleece-lined chest, 1 Napoleon, 1 internal water bottle, 1 internal security 

Seam Taped:

Yes 

Powder Skirt:

Yes 

Hood:

Yes 

Removable Hood:

No 

Zip-in Compatibility:

N/A 

Recommended Use:

Waterproof protection during alpine sports 

Weight:

2lbs 2 oz / 964 g 

Warranty:

Lifetime (manufacturer defect) 

Country of Origin:

Vietnam