I actually sometimes like lettuce, sometimes its just not my bag!  I had 5 tubs to take back to Lush, and ended up with this beaaaaauuuutiful tub of green goo!  I love it.  I just absolutely love it!  I've actually never had a green face mask before, my go to face mask is generally the Dead Sea Spa Magik Mud Mask.  I like the green-ness, it makes me feel fun, and also a bit like a vegetable, so healthy!  
Lush says:

This mask is a seaweed gel with exfoliating granules through it. 
Ideal for those who want to clear away dead skin and brighten the face, whilst also gently treating it to softening ingredients.
First we make a seaweed gel using agar, then we add honey and almond oil to soften and moisturise the skin. Kaolin and fullers earth deep clean, absorb grease and debris and tighten the skin. Finally there are ground almonds and ground almond shells, so that when you come to wash this off with water, you can work it over your face for a few minutes to exfoliate away dead skin.  
Simply fragranced with 100 percent pure French lavender, to balance the skin’s sebum production.
Ground almond shells are a good natural exfoliant. They are rough enough to give a good scrub, but soft enough not to damage the skin. Every skin is different, and you decide how much pressure to use and how long to scrub for.

The mask is lovely and thick, and when spread onto the skin, on immediate contacts cools the skin in a really lovely way.  The consistency, as well as thick, is somewhat grainy due to the ground almond.  It is suggested that you leave this on for about 10ish minutes I think, but I am no good with instructions, and leave it on until it starts to flake off my face!  It does tighten as it dries, and you can almost feel the kaolin sucking all the yuk out of your pores, and when you finally come round to washing it off, I suggest moistening your hands a tad, and massaging in circular motions to really make the most of the exfoliating properties.  Add a bit more water and carry on washing it off.  After patting dry with a towel, my skin was so soft, and, surprisingly remarkably bright!  Just like the label says!  I wholeheartedly recommend this to everyone, I don't believe there is a skin type it wouldn't suit!
Love A.x