The Ultra S/S Tee has been conceived for mountain runners and ultrarunners. This athletic-cut short-sleeve shirt of polyamide with a good portion of stretch elastane guarantees optimum fit and freedom of motion with its four-way stretch -- meaning plenty of freedom of movement any which way. Superior fabric ventilation, complemented with perforated inserts at the sides ensure great temperature regulation, making it a top choice for long distances. Two pockets on the back allow storage of flasks and small water bottles that can be accessed with one hand. The shirt, with silicon gripper elastic cuffs, weighs just 180 grams. The fabric has a “UV Filter” for UPF 50+ sun protection and also resists pilling.