Double glued blindstitched seams. Sewn with a two-thread stitch that ties itself off if the stitch is broken. An additional wrist and/or ankle zip keeps water out and enhances suit flexibility. With the various types of wetsuit and boots Tilos offers, one thing remains a constant: the metal YKK zipper. The persistent metal YKK zipper is anti-rust and is sure to last whether on your first dive out, or your last.