Atan Hot Mistral Hot 6.5MM Wetsuit Boot. Many of you will already know that Atan have for many years made the most flexible and warmest boots available in the market, particularily distinguished from other manufacturers by their incredible barefoot feeling sole unit. The barefoot feeling is made possible by using a natural latex dip procedure which is a unique process to Atan. These boots are extremely light, flexible, comfortable and warm. The mistral boot features glued and blindstitched seams, titanium lined neoprene and a strap around the top of the boot.