Yak developed the Zinc as a low price neoprene deck and actually found it became the most popular design , so for 2023 is the only yak neoprene deck , made from 3mm neoprene. Shockcord provides the spring . It comes in 3 boat sizes and two waist sizes.
Keyhole is rare size as this tends to be an old school kayak like an rpm or a sea kayak. Bigdeck is very common as fits majority of kayaks including Dagger GT ,Wavesport Diesel , most Pyranha kayaks including Inazone. Extra big deck is often the current large creekers, also Pyranha b2. s/m waist is actually ok for up to 32, 34 is a squeeze, l/xl is 34 to 38
5202 is code for keyhole
5203 is code for big deck
5204 is code for extra big deck