Thermoball, The North Face’s revolutionary insulation alternative, was developed to solves a problem. Goose down is widely recognised as the warmest and lightest insulation available, yet once wet its insulation properties are less than efficient. Whilst synthetic insulations, performs better in wet condition, is heavier and less compactable and not as warm. 

Thermoball insulation is the product of a partnership between The North Face and PrimaLoft. Unlike Traditional, continuous-filament synthetic insulation, the small round PrimaLoft synthetic fibre clusters closely to mimic down clusters, trapping heat within small air pockets to retain warmth.

The mimic down synthetic, Thermoball is equivalent to 600 fill power goose down, giving it an incredible warmth to weight ratio. Yet due to it being synthetic the insulation, unlike down maintains its warmth in wet conditions, meaning you can enjoy the warmth of down in any environment and any condition.

Gone is the bulk of down, replaced by ultra-light synthetic clusters held within a baffle construction. Thermoball is available in hooded, non-hooded and vest style jackets from The North Face, that all pack down into their own pockets, making it the perfect garment for every adventure.