Im usually a medium. if i want just slightly loose should i just get medium?

Tech Specs:

Material:

[membrane/laminate] MicroShield (2-layer), (solid) [shell] dobby weave, (print) [shell] peached flat faced polyester; [lining] zonal poly knit twill, taffeta (210T) 

Fabric Waterproof Rating:

10,000 mm 

Fabric Breathability Rating:

10,000 g/m² 

Hood:

yes 

Venting:

underarm mesh 

Powder Skirt:

yes 

Pockets:

(external) 2 front hand, 1 front chest, (internal) 1 media, 1 goggle 

Wrist Gaiters:

yes 

Recommended Use:

snowboarding 

Manufacturer Warranty:

1 year