105G ULTRA LIGHTWEIGHT WATERPROOF MOUNTAIN SHELL Weighing in at just over 100g and packing down as small as a tennis ball this OMM Halo Jacket offers excellent waterproof protection and breathability making it a fantastic and reliable choice for your outdoor adventures including running hiking cycling and even a mountain marathon This ultra lightweight breathable shell is made from a 2 layer static fabric which offers a fantastic hydrostatic head of 10 000mm to keep you dry and a vapour transfer rate of 10 000m/24hrs to keep you comfortable while enjoying the most challenging outdoor events When we saw this jacket we could not believe how lightweight and compact this technical high performance jacket really is but you will be thankful of having stashed it in your bag if you are caught out by the harsh UK weather while taking part in an ultra distance race completing your first running event or even enjoying the buzz of a fun run