So Im about 5-10" and weight 145lbs. should i go with a medium or small?

Tech Specs:

Material:

[Shell] WindStopper; [Lining] Cirrus and Transporter 

Insulation:

650-Fill down 

Hood:

Yes, removable 

Pockets:

2 Hand-warmer, 1 chest, 2 internal 

Waterproof:

Water-resistant 

Core Venting:

Mesh-lined Underarm zips 

Weight:

31oz (879g) 

Recommended Use:

Skiing, alpine climbing, cold weather wear 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China