A sleeveless version of the Thermo-Shirt in Polartec material is also available. This garment is identical in terms of material and workmanship to the Thermo-Shirt and has a 2-way zip fastener along the entire length. Because it is highly breathable, this vest is ideally suitable for all shooting stances and can be worn over the Technical Shirt to provide better cushioning and extra support in the torso area. The arm sense for the best shooting position is fully maintained.