I'm around 5'6"- 5'7", 115 pounds, and not sure if I should get the small or medium. Any suggestions?

Tech Specs:

Material:

[shell] nylon dobby weave; [lining] mesh polyester 

Fabric Waterproof Rating:

5000 mm 

Fabric Breathability Rating:

5000 g/m² 

Fit:

baggy 

Venting:

none 

Powder Skirt:

yes, fixed 

Pockets:

2 front, 1 sleeve 

Seams:

critically taped 

Wrist Gaiters:

no 

Hood:

yes, full-time 

Liner-Compatible:

no 

RECCO:

no 

Recommended Use:

snowboarding 

Manufacturer Warranty:

1 year