The Dawn Patrol offers performance and warmth features along with durability and great value. This wetsuit has many of the high-end features you will find in our Ultimate suits including E5 Flash Lining, E5 neoprene and E4 Thermo lining. All taped seams apart from arms and shoulders (to increase flexibility). Fleece lined torso and legs. Warmer than most other 4 mil suits without sacrificing too much movement.