These arm warmers are a great choice for changeable days that youll find in spring or autumn or even summer in some regions just enough thermal protection to keep a chill off as you warm up into the ride or maybe stow in a back pocket to pop on at a cafe stop to maintain warmth thermodrytex plus maximum stretch and a thick warm fleece inner layer make this fabric ideal for uses where warmth and flexibility are key 84 nylon and 16 lycra keep the fabric soft and stretchy the water rep