ThermoBall™ technology is The North Face's new synthetic alternative to down. Developed in partnership with Primaloft, it uses clusters of round synthetic Thermoball™ to trap and retain heat within small air pockets to provide effective insulation, even when wet.
TNF reckon the Thermoball provides warmth equal to 600 fill goose down, but performs far better in wet weather. The Thermoball hoodie is also compressible, so you can pack it in it's own pocket!
To win one of two Thermoball hoodies (one men's one women's), all you need to do is answer the simple question below and enter your email address.
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