You will be able to get away with almost any type of gear. The thing to remember is that the more specific the gear is to Freediving/Spear fishing the better your performances will be.
Make sure to get a low volume Freediving or Spear fishing mask. Not just a low volume Scuba mask. Some popular makes and models are:
A fin with a removable foot pocket is usually best. This will allow you to use different blades in the same foot pocket. It also means that if you break a fin you can simply replace the blade and not the whole fin. You should be able to hold the fin by the back of the heel and it should stay straight and not bend at the base of the foot pocket.
There are three types of blades to choose from. here they are with their PRO’s and CON’s:
Plastic Blades – PROS: Less costly and the most durable CON’s: heaviest blades so you waist energy moving the fin; no rails to guide the fin blade and slow in the return of the blade to it’s original position
Composite Blades – PRO’s: lighter weight fin; good price; has rails; come in removable foot pockets; several stiffnesses and performs better then plastic blades CON’s: Slightly more money then plastic fins
Carbon Fibre Blades – PRO’s: Best performance of all blades; lightest weight; several stiffnesses; comes in a removable foot pocketCON’s: high price tag
Waterway Captain NEMO fins (Waterway also makes great Mono Fins) – Composite Blades with removable foot pockets
OMER – OMER has a good line of bi-fins (plastic and composite) and also distributes the C4 Carbon Fibre fins.
Riffe – Plastic
Picasso – Plastic and composite blades with removable foot pockets
Beuchat – plastic blades with removable foot pockets
Cressi – plastic blades (Gara 2000 & Gara 3000)
A Freediving/Spear fishing specific suit makes a huge difference due to the added flexibility and warmth in comparison to a Scuba or Surf suit. Here are a few companies that make good Freediving/Spearfishing wetsuits.
Rubber weight belts are best as they stay in place and don’t slip around while you dive.
You must have either a waterproof digital timer like a Timex watch or better yet is a freediving computer. There are a few scuba computers that now have a freedive function but the one most Freedivers wear is the Suunto D4.