COLD.RDY APP: STAY WARM. Our insulating technology keeps you feeling warm and confident when it's cold outside. COLD.RDY keeps the heat and makes you feel dry. AEROREADY ACC: FEEL READY. FEATURES:- Our adidas technology helps you feel comfortable and ready. AEROREADY lets fresh air keep circulating- Primegreen: This product has been made with Primegreen: a series of high-performance recycled materials.- Merino Wool: antibacterial and anti-odor- Merino Wool: provides breathability, thermal insulation and comfort in all conditions- 3 stripes arch support: for stability and fit - Anti blister yarn on toe and heel: for a maximum performance - Mesh area on the upper foot: for an increase breathability