Maintain running warmth in the cold but don't ever feel weighed down. The On Running Weather Running Vest utilises impossibly lightweight Japanese stretch fabrics and 100% recycled polyester insulation, keeping warmth in and the elements out. At just 100 grams you'll hardly know it's there. And should you get too warm, it packs easily into its own pocket.

Heat-trapping insulation is deployed across the front panel, preventing your body's warmth from escaping. Meanwhile, across the back, a highly breathable panel gives sweat an easy escape route. Whether pushing the pace or taking it steady, this lightweight running vest will regulate your temperature just right as temperatures drop. The regular fit lets you move easily during your run and reflective details shine when your training extends after dark.