Short john wetsuit is a summer wetsuit. It is a cross between a shorty and a long john. It has no sleeves for your arms and short ones for your legs. No neoprene on your arms means easier paddling because every millimeter of neoprene on your arms and shoulder means resistance that meets your every paddle. Short john wetsuit is meant for summer surfing and surfing in warm waters at temperatures about the same as they are for a shorty – around 72F/22C or when there is wind, lower air temperature, bad weather.
Neoprene thickness in short john wetsuits is usually 2 millimeters. Seams are flatlocked – not waterproof. Great summer wetsuit if you like the free feeling of your arms.