Fabulously warm and comfortable, these will allow you stay out in the coldest of weather. The Global replaces Sugoi’s midzero flash tight, the fabric is the same the main difference is the styling of the reflectivity, the Global adopts the Pearl Izumi style dots. If you liked the Midzero tight you will like these. Easy to care for. Definitely do not tumble dry. A medium equates to a size 12.