why won't the six percent coupon work?

Tech Specs:

Material:

[shell] Exotex (polyester) 

Insulation:

polyfill (60g) 

Fabric Waterproof Rating:

5000 mm 

Fabric Breathability Rating:

5000 g/m² 

Hood:

yes 

Fit:

standard 

Center Back Length:

32 in 

Venting:

underarm zip vents 

Powder Skirt:

yes 

Pockets:

(external) 2 hand, (internal) 1 goggle / media 

Seams:

critical seams taped 

Wrist Gaiters:

no 

Recommended Use:

snowboarding, winter activites, casual 

Manufacturer Warranty:

1 year