In a perfect world, wetsuits would be seamless. Until then, the goal is to make seams as light, flexible, durable, and impermeable to water as possible. While each brand has its own lingo, there are four basic seam constructions on the market: flatlock; glued and blind stitched (GBS); glued and blind stitched with taping; and liquid rubber seam seal.
Flatlock - A durable, breathable, and economical seam construction where two panels of neoprene are overlapped and stitched together using a flatlock stitch. Flatlock seams are often found on warmer water suits and neoprene tops where absolute waterproofing is not critical or necessarily desired.