Isotherm - Densely packed fibres to retain heat & warmth without adding weight or discomfort Merino - Very warm high quality wool, naturally antibacterial properties to keep you fresher for longer Antibacterial - Stay fresh & odour free for longer while walking and running Lightweight - Comfortable materials designed for all-day wear during travel, holidays, and outdoor adventures without adding bulk or weight 2 year warranty - Includes a 2-year warranty for guaranteed quality and peace of mind