Features " Optimised insulation minimizes weight while maximizing heat retention " 5 sewn in carbon fibre heating zones - distributes heat to core body areas and to the pockets " Superior runtime - up to 8 hours of heat on a single battery charge and slimmer design " Multiple heating zones - 5 sewn in carbon fibre heating zones " Easy touch heat controller - 3 heat settings: High, Medium, Low " M12™ battery holder - sleek pocket design for minimal user interference " USB power port to charge electrical devices - charge phones/MP3 players whilst on the move " Hand pockets + added chest pocket - ideal for storing a mobile phone, iPod, MP3 player, etc. " Water and wind resistant - provides comfort and durability in harsh environment " Expandable battery pouch for use with all M12™ REDLITHIUM-ION™ battery packs " Machine washable and dryable