Aventure Verticale Illamina (Powerstretch)
A warm, flexible and quick draining undersuit in a very technical fabric. Cut for a close fit, which is possible due to the four way stretch, the Illamina has a high and surprisingly warm collar (we cannot work out if it is Polartec 200 fleece or doubled Powerstretch; either way, it is very cosy).
There are pockets for knee pads, as with the Arphidia, which are useful for those with delicate / battered knees, or those in very vertical caves where kneepads are a nuisance.
The medium weight two way front zip is offset slightly for comfort, to avoid the delicate throat area.
A fairly simple suit - no hoods or pockets - but effective due to the excellent material, as long as you don't overheat easily. What you get is, currently, about the best fabric for under suits used for cool - to - cold trips, where water is encountered.