This hooded 7mm suit has a diagonal zipper for easy donning and doffing. The suit is equipped with an "Insulayer" with 3mm THERMALSKIN Vest. Suit is also equipped with a high stretch neoprene nylon II neck to ease donning and a 7mm vented hood which won't trap air and cause mask fit problems like with non-vented hoods, the hood comes with a 5mm face seal. The suit is anatomically contoured at the arms, (with 4mm flex panel in elbow) knees and lower legs to increase the warmth by shaping to your body lowering the gaps in the suit seal to body; this increases the performance of fit giving extended warmth in the coldest conditions.