Also read the review from Kiteworldmag:

Limet og blindsticted sømkonstruktion : Blindstingssømmen er passende navngivet

• Soft and durable quality

the 1850R has more lift than the 1500R

so you have more hours in the water

Sooruz Fly+ 4/3 mm Chest Zip Våddragt Size:LS Also read the review fromThe seams are reinforced with ultra flexible neoprene , which optimizes the suit's durability and warmth The lining on the stomach and back will maintain your natural body temperature Chest Zip Easy to put on Reinforced knees The wetsuit with all the Soruz expertise at the best price Made of soft and robust Limestone G3 flex neoprene, The seams are sewn and glued (GBS) and reinforced with patches at intersections and critical areas, Duraflex