The A-line series maintains it's no-nonsense style, with super light, flexible nylon neoprene throughout the body and 20% super stretch neoprene in all the key areas for maximum flexibility. All A-line fullsuits are 3mm in the body and 2mm in the arms, with a breathable, durable, flatlock seams, water tight ykk zipper, and flexible, abrasion resistant Kevlar kneepads making this suit a great value.