I have a Mt Hardwear Offwidth in medium. I'm 5'10" 155 and the fit is perfect everywhere except in the arms which seem short. I thought about going a size up to see if the arms would be longer but then worried the jacket would be too bulky and baggy around the torso. Is this sizing trend true of the windstopper insulated jacket too?

Tech Specs:

Material:

[Shell] Windstopper softshell 

Insulation:

Thermic Micro 

Hood:

Yes, removable 

Pockets:

2 Welded handwarmer, 1 chest, 1 inner 

Waterproof:

No 

Core Venting:

Underarm zips 

Weight:

1lb 14oz (872g) 

Recommended Use:

Cold-weather climbing, Nordic skiing, snowshoeing 

Manufacturer Warranty:

Lifetime 

Country of Origin:

China