Will this jacket keep me warm around 10 degrees? need serious help. I have a Steep tech and they do no good. i have to wear a sweatshirt and a sweater under it to b warm.

Tech Specs:

Material:

[Shell] 2L HyVent nylon; [Shell lining] quilted Heatseeker 

Insulation:

Heatseeker synthetic 

Waterproof Rating:

[Shell] 25PSI (about 18000mm) 

Core Venting:

[Shell] Pit-zip vents 

Pockets:

[Shell] 2 hand-warmer, 1 Napoleon, 1 internal cargo; [Liner] 2 hand-warmer 

Seam Taped:

[Shell] Yes, critically 

Powder Skirt:

No 

Hood:

Yes, removable 

Zip-in Compatibility:

Yes, zip-in liner included 

Weight:

38.5oz (1090g) 

Recommended Use:

Skiing, cold weather, street 

Manufacturer Warranty:

Lifetime