Socks in 3mm neoprene, smooth outside, open cell on the inside, sole and heel with reinforced lining. Preformed cut for maximum comfort and heat retention. PLEASE NOTE: This wetsuit is comprised of open-cell neoprene, due to the delicate nature of this material we cannot accept refunds or exchanges for wetsuits that are used or returned with fingernail tears or any other neoprene damage. Please use caution when trying on. ALL of our wetsuits are thoroughly inspected before shipment/sale to ensure there are no tears or damage.We appreciate your business and want you to be aware of both the benefits and limitations of your gear. Due to the materials and composition of this suit we have found one drawback to it, which is a susceptibility to tears most commonly occurring when it is being donned and doffed. With gentle handling, this suit can be a valued and lasting piece of equipment. These suits are specifically designed to be donned with a lubricant.