Best - usually insulated and very durable, has tech features
Frigid - premium insulated, ideal for extreme cold
Leather/Synthetic - usually leather palm, synthetic backing
Synthetic - man made material replicates the qualities of down
The Fission Mitten from Arc'Teryx is weatherproof and insulated for complete protection from the elements, perfect for long days in cool conditions. Designed with versatility in mind, these guaranteed waterproof mittens are loaded with PrimaLoft insulation for ultimate warmth in cold weather. The leather reinforced palm and fingers offer unmatched durability, while the elasticated wrist back self-adjusts to trap heat. A soft, brushed liner ensures next to skin comfort, and the DWR treated nylon inner cuffs shed snow and moisture easily. The Fission Mittens also feature removable wrist leashes and webbing loops that allow the Mittens to be clipped together.