After several tweaks and revisions the latest aireator is the best that defeet have ever made made from coolmax174 ecomade the fibre that comes from recycled plastic bottles the defeet aireator line the aireator174 still leads in lightweight durability moisture wicking and air permeability the original aireator174 features a double cuff which provides additional compression in the ankle zone it39s what defeet call stay fast meaning it will not slip from the moment you pull