Long-sleeved high-neck T-shirt with zip fastening. Strategic opening in the cuff for the thumb, for better mobility. The structure of the fabric allows air and moisture to pass through it to keep the wearer drier and more comfortable. High-strength fabric that can be stretched in four directions, lengthways and widthways, providing space for movement. This garment has been laboratory tested to withstand extreme temperatures between +19º and +3.6º.