From The Improbable Island Contestant's Survival Guide, Season 2 Edition.
Your implant is that big, thing built into your body in awkward places1). It provides you with additional capabilities - and you're definitely going to need those on the Island.
Implants are free to all contestants, and can be removed at any contestants request2). Get your implants at the Implant Hut in any outpost! Just look for the hut that says "IMPLANTS."
New contestants ('newbies') can request one of two types of implants:
Rumor has it that after killing the Improbability Drive twice, the contestant will be offered a choice of additional types of implants, and more implant types become available as the number of drive kills increases. At this time, the following implants are rumored to be available for more experienced contestants:
Keep a piece of lead pipe on your person at all times.
If your implant shorts out, you're doomed. You are therefore advised to avoid bathing at all costs.
More specific descriptions can be found in the catalogs inside the Implant Hut.
FEET REPLACED WITH WHEELS.