Palm Quantum wet-suit Long-john Size L - As new and never used. Cost GBP65 Will accept (GBP45) = 1600B with Free Shipping Also throwing in the Neoprene Boots for Free ... Size 9 - 10 The Palm Quantum Front-Zip Long John is made from high-quality 3mm neoprene. It has reinforced knees, flat-locked seams and a stretchy back panel giving good freedom of movement. The Palm Quantum is ideal for canoeing and kayaking.