Why no seals?
It's a matter of cost and degree.
Since we are talking about wetsuits a level of economy and simplicty is implied. Some such as Bare fo have flip seals in the forearm and calf areas that slow the movement considerably. In colder water gloves, booties and perhaps socks are implied and these form a labyrinth seal at the openings when fit correctly.
Ratchet the $ up to an Mares Isotherm is similar suit and you have a hybrid that is warmer but cost more to buy and exposes you to some hefty repair bills. It you are in a rough and tumble situation they demand care and attention, sand for instance would raise heck with a dry zipper.
Lastly if you want true sealing then get a drysuit.
Pete
It's a matter of cost and degree.
Since we are talking about wetsuits a level of economy and simplicty is implied. Some such as Bare fo have flip seals in the forearm and calf areas that slow the movement considerably. In colder water gloves, booties and perhaps socks are implied and these form a labyrinth seal at the openings when fit correctly.
Ratchet the $ up to an Mares Isotherm is similar suit and you have a hybrid that is warmer but cost more to buy and exposes you to some hefty repair bills. It you are in a rough and tumble situation they demand care and attention, sand for instance would raise heck with a dry zipper.
Lastly if you want true sealing then get a drysuit.
Pete