Cressi Wetsuit Buyer’s Guide: Picking the Right Thickness for Florida Keys Diving

It’s the Florida Keys, so you probably just need the thinnest suit, right? That’s the call most divers make at first, and it’s the one we hear get reversed most often after a long boat day. Warm water doesn’t always mean one obvious answer. If you run cold, plan to do more than one dive, or want a suit that feels right from the boat ride to the bottom and back, thickness matters a lot! Cressi suits are known for being flexible and comfortable, but choosing between a 3mm, a 5mm, or something lighter is really about how you dive, not just where. Add fit, stretch, and whether a model leans scuba, snorkel, or spearfishing, and the picture gets fuzzy fast. This guide will help you sort through it so you can show up on the boat in the right suit and stop thinking about your gear.

Start With How You Dive, Not Just the Water Temperature

The best wetsuit for Florida Keys diving comes down to exposure. A quick snorkel, a relaxed reef dive, and a two-tank trip ask different things of your suit. If you get chilly easily, stay down longer, or dive several days in a row, a little extra neoprene goes a long way.

If you’d rather have easy movement, lighter packing, and a thinner feel in the water, lighter neoprene is probably your spot. There’s no prize for buying the thickest or thinnest suit. The win is staying comfortable enough that you can enjoy the reef without thinking about what you’re wearing.

Cressi Wetsuits We Stock at Captain Hook’s

These are the Cressi suits we carry online right now, lined up the way you’d actually choose between them. Each model comes in a men’s and a women’s cut at the same price, so start with the thickness that matches your dive plan.

Suit	Thickness	Best for	Price
Cressi Guardian Vest (men’s) / women’s	2mm	Snorkeling, warm surface days, and divers who want maximum freedom of movement	$69.95
Cressi Velvet 3mm (men’s) / women’s	3mm	The versatile pick for most warm-water scuba and snorkel plans	$189.95
Cressi Balam 5mm (men’s) / women’s	5mm	Extra warmth for longer boat days, repeat dives, or divers who run cold	$299.95

Prices and online availability can change, and our in store inventory is often different from what’s online, so call ahead if you have your heart set on a specific suit.

Thickness Comparison: 3mm vs 5mm and Lighter Options

Here’s the quick way to compare Cressi thickness options before you try one on.

Thickness option	Best fit for	Tradeoff to consider
Lighter warm-water suits	Snorkeling, surface time, very warm days, divers who want max freedom of movement	Less thermal protection for longer scuba dives
Cressi 3mm wetsuit	Most warm-water scuba and snorkel plans where you want coverage without bulk	May not be enough if you run cold or do longer repeat dives
Cressi 5mm wetsuit	Divers who want more warmth, especially over longer boat days or multiple dives	Can feel a bit more buoyant and less nimble than a 3mm

A Cressi 3mm wetsuit is the most versatile starting point for warm water. It gives you coverage without feeling heavy, and it’s the one most divers reach for when flexibility matters first.

Fit Is Just as Important as Thickness

A wetsuit works when it sits close to your body without squeezing, gapping, or bunching. Loose areas let water flush through. Too tight, and the suit becomes a distraction before you even stride off the boat.

Fit question	What to look for
Shoulders and chest	You can breathe and move your arms without fighting the suit
Waist and lower back	No obvious gaps where water can flush through
Arms and legs	Close fit without bunching behind the knees or elbows

The Cressi wetsuit size chart is a solid starting point, but it shouldn’t be the final word if you can try the suit on. That’s especially true when you’re shopping for a Cressi womens wetsuit, where stretch, torso length, hip fit, and shoulder comfort can change how a size actually feels.

Scuba, Snorkeling, and Spearfishing Suits Are Not Always Interchangeable

When you’re comparing a standard scuba suit to a Cressi spearfishing wetsuit, start with the activity. Spearfishing-focused suits are built for freedivers and hunters who want specific feel and coverage. Recreational scuba divers usually do better with a simpler suit that’s easy to don, sits well under a BCD, and clearly matches the dive plan.

The biggest difference is the neoprene itself. Most dedicated spearfishing suits are open-cell, two-piece designs, which means the raw neoprene seals directly against your skin instead of sitting behind a nylon lining. That seal traps warmth far better, so a 3mm open-cell suit is actually warmer and stretchier than a 5mm lined scuba suit. It’s also why thickness numbers don’t translate one to one between the two styles. For Florida Keys water, most spearos do well in a 1.5mm open-cell suit through the warmest months and step up to a 3mm when it cools off, usually in a camo pattern for concealment. Well-regarded warm-water options include open-cell camo suits from brands like Florida Freedivers and SEAC, along with Cressi’s own open-cell line if you’d rather stay with one brand.

Same idea when you’re staring at model names like a Balam wetsuit, a Velvet, or a Cressi Fast. Don’t buy on the name. Compare thickness, cut, intended use, and how it actually feels when you move. If you’re leaning toward spearfishing, talk to us about getting the right open-cell suit dialed in before your trip.

Why Local Fit Help Beats Guesswork

Online charts help. They don’t beat a dive shop crew who can put their hands on the suit with you. That’s especially true when you’re stuck between 3mm and 5mm, buying close to a dive date, or trying not to pack the wrong suit for your Keys trip.

At Captain Hook’s, you can match your gear to the kind of diving you actually have planned, whether that’s a reef day or a wreck trip. Still building your itinerary? Start with our guide to the best places to dive in the Florida Keys, then pick the suit that fits the adventure. Keep in mind, our in store inventory is often different from what’s available online, so please call ahead if you’re planning on stopping by our Marathon, Big Pine or Key West locations.

Frequently Asked Questions

How do I use a Cressi wetsuit size chart if I’m between sizes?

Start with the chart, then pay close attention to your chest, waist, torso length, and shoulder mobility. A wetsuit should feel snug enough to limit flushing without making it hard to breathe or move. The better size is usually the one that matches your body shape, not just your height and weight.

Is a Cressi 3mm wetsuit enough for Florida Keys diving?

For most warm-water scuba and snorkeling days, yes. A 3mm gives you light insulation and coverage without the bulk of a thicker suit. If you tend to get cold quickly or plan on multiple dives, you may want more warmth.

When should I choose a Cressi 5mm wetsuit instead?

A 5mm makes more sense when warmth matters more than a featherlight feel. It’s a better fit for divers who run cold, do repeat dives, or want a little more comfort margin on breezier boat days.

What makes a Cressi womens wetsuit different from a unisex suit?

A women’s suit is cut for a different body shape, especially through the chest, waist, hips, and torso length. That changes how the suit seals and feels in the water, because a suit that matches your shape stays put better and feels less restrictive.

Can I use a Cressi spearfishing wetsuit for scuba diving?

Sometimes, depending on the suit and the kind of diving you do. Spearfishing suits are built for a specific use, so scuba divers should check that it still feels comfortable with tanks, buoyancy changes, and longer surface intervals before choosing it over a standard dive wetsuit.

What should I look at first when choosing between a Balam wetsuit and a Velvet wetsuit?

Start with thickness, fit, and the type of diving you’re actually doing. A suit that sounds right on paper can still be the wrong choice if it feels too tight, too loose, or better suited to a different water temperature or activity.