Well landboarding is a tricky sport new set of rules to learn vs water and snow. I believe in the begining there is for sure a set of must haves for ground boarding. As you progress you will learn to not need them as much.
1. Helmet (always no matter what your doing with a kite)
2. kneepads of any kind more padding on the actual knee more than anywhere else.
3. I ended up buying a pressure suit from sixsixone or any mountain board with spine protection equivelent.
http://www.motoworldracing.com/SIXSIXON ... -Suit.html here is an example note: shop around the suit i ended up buying was a little over 100$
4. gloves
5. snowboard boots- after breaking my leg i didn't wanna take any chances so for the first few months getting back on the board i'd adjust the bindings wide as possible to ride with them. basically anything a bit better then tenny's You may suddenly need to run fast and a rolled ankle is very quick and easy with out proper support.
6. back to helmets- full or half face. I don't know i think its up too you. If you're timid and learning maybe go extra on every thing and full face it. I started kiting with a motocross helmet. my neck hurts ouch so if you're really into it try a paragliding full face charley insider is a good inexpensive one.
http://www.pegasusparagliding.com/Pages ... sories.htm Try a bmxer or biking helmet basically anything comfortable.
7. pants I'd like to find a cool pair of tuf material dark color pants that are not hot and won't stain. Don't landboard in nice clothes they WILL TURN GREEN or BROWN.
As you get the hang of land boarding less gear is needed but there is always that one time. I'd say your knees are important and i'd look at padding them other then that don't ever put an arm out to land from a fall the body as unnatural as it seems to sacrifice can take more impact then a dislocated arm.
I love the wind and I love getting HIGH on air.