Henderson 3mm Thermoprene Men's Front Zip Jacket3mm Thermoprene Men's Front Zip Jacket The ultimate in utility, this Long Sleeve Jacket is most often paired with a john or jane for full length protection and outstanding core warmth, but worn alone its an ideal companion for warmer conditions. Long sleeves increase both warmth and abrasion protection from divings natural bumps and scrapes. Available in three thicknesses, this Shorty Jacket can be mixed and matched with any other suit to accommodate