Seac Basic HD Diving Boots W/Zip 5mm
In stock — ships from Irvine, CA
This item is currently on backorder. Order now to reserve yours, and we will ship it as soon as it is back in stock.
Seac Basic HD Diving Boots W/Zip 5mm - 2XS (2X-Small) is backordered and will ship as soon as it is back in stock.
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Seac hood, boot and glove sizing. Imperial in bold, metric underneath.
Hoods
| Hood size | Head circumference in · cm |
|---|---|
| XS |
20.9–21.3 53–54 |
| S |
21.6–22 55–56 |
| M |
22.4–22.8 57–58 |
| L |
23.2–23.6 59–60 |
| XL |
24–24.4 61–62 |
| 2XL |
24.8–25.1 63–64 |
| 3XL |
25.6–26 65–66 |
Footwear
| Footwear size | Foot length in · cm |
|---|---|
|
2XS EU size 36–37 · US size 4–4.5 · UK size 4–4.5 |
9 23 |
|
XS EU size 37–38 · US size 4.5–5.5 · UK size 4.5–5.5 |
9.4 24 |
|
S EU size 38–39 · US size 5.5–6.5 · UK size 5.5–6.5 |
9.8 25 |
|
M EU size 40–41 · US size 7–8 · UK size 7–7.5 |
10.2 26 |
|
L EU size 42–43 · US size 8.5–9.5 · UK size 8–9 |
10.6 27 |
|
XL EU size 43–44 · US size 10–11 · UK size 9–10 |
11 28 |
|
2XL EU size 45–46 · US size 11.5–12.5 · UK size 11–11.5 |
11.4 29 |
|
3XL EU size 47–48 · US size 12.5–13 · UK size 12.5–13 |
11.8 30 |
For the most accurate fit, we recommend referring to the foot length indicated in the size chart.
Gloves
| Glove size | EU size | Palm circumference in · cm |
|---|---|---|
| 2XS | 5 |
7.00–7.48 17.5–19 |
| XS | 6 |
7.48–8.07 19–20.5 |
| S | 7 |
8.07–8.66 20.5–22 |
| M | 8 |
8.66–9.25 22–23.5 |
| L | 9 |
9.25–9.84 23.5–25 |
| XL | 10 |
9.84–10.43 25–26.5 |
| 2XL | 11 |
10.43–11.02 26.5–28 |
Source: Seac’s current size chart.
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Product Information
The Seac Basic HD Diving Boots W/Zip 5mm are unisex scuba dive boots built from 5mm neoprene with a semi-rigid anti-slip sole, made for divers who need solid foot and ankle protection with reliable warmth. A stainless steel side zipper and Velcro strap make them fast to put on and take off at the shore or on the boat.
Who it is for
These boots suit scuba divers who want a sturdy, protective boot with 5mm neoprene warmth. The semi-rigid anti-slip sole provides grip and stability underfoot. The side zipper and Velcro strap also make them a practical choice for divers who want quick, fuss-free entry and exit from their boots between dives.
Key details
- Thickness: 5mm neoprene for warmth in a range of water temperatures.
- Sole: semi-rigid, anti-slip construction for grip and stability.
- Closure: stainless steel side zipper paired with a Velcro strap.
- Support: PU insert at the instep for added structure and support.
- Heel: rigid rubber notch to help secure fin straps in place.
- Lining: nylon lining for easier on and off wear.
Compatibility and sizing
These boots are offered in sizes 2XS through 4XL, so divers should match their usual boot size to the foot pocket of the fins they plan to wear, since boots add bulk that the fin pocket needs to accommodate.
DiveCatalog.com is an authorized Seac dealer and has operated as a dive shop in Irvine, California since 2003. Call 888-701-4017 or start a chat if you have questions about sizing or fin compatibility before you order.
- 5mm neoprene construction delivers warmth for a range of diving conditions.
- Semi-rigid anti-slip sole provides grip and stability on wet or uneven surfaces.
- Stainless steel side zipper allows quick, easy entry and exit.
- Velcro strap fastening works with the side zip for easy wearing.
- PU insert adds support at the instep and foot.
- Rigid rubber heel notch helps keep fin straps securely in place.
- Nylon lining makes the boots more comfortable to put on and take off.
- Unisex sizing from 2XS to 4XL covers a wide range of foot sizes.
| Brand | Seac |
| Model | Basic HD W/Zipper |
| Product code | 0210006 |
| Thickness | 5mm neoprene |
| Sole type | Semi-rigid, anti-slip |
| Closure | Stainless steel side zipper with Velcro strap |
| Instep support | PU insert |
| Heel feature | Rigid rubber notch to secure fin straps |
| Lining | Nylon |
| Sizes available | 2XS, XS, S, M, L, XL, 2XL, 3XL, 4XL |
| Fit | Unisex adult |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
What thickness of dive boots, gloves, or hood should I choose?
As a general rule, thicker neoprene insulates more, so colder water pushes you toward thicker accessories, but fit, dive length, and personal cold tolerance matter as much as the millimeter number. Divers commonly lose a great deal of heat through the head, so a hood is often the highest-value warmth upgrade for the money. Remember that every added piece of neoprene also adds buoyancy you will need to account for.
How should dive boots fit?
Boots should fit like a snug athletic shoe, with no heel lift and no crushed toes; a little water inside is normal, a sloshing pocket is not. Try them on with the socks you would actually dive, and remember your fin foot pocket has to accommodate the boot. Hard-sole boots protect on rocky shore entries, while soft-sole boots are lighter and pack smaller for boat and travel diving.
How should dive gloves fit?
Gloves should be snug across the palm with fingertips reaching the ends without bunching, since trapped air and loose fingertips destroy dexterity. Thicker gloves are warmer but make buckles, clips, and inflator buttons harder to operate, so choose the thinnest glove that keeps you comfortable in your conditions. Try working a clip or buckle while wearing them before you commit.
How should a dive hood fit?
A hood should seal around the face and neck without restricting your throat or jaw, and lie flat on your head without pulling the mask strap out of position. A loose hood flushes cold water continuously, while an overly tight one is distracting and uncomfortable. Many hoods have a vent to release air trapped during descent, so check yours and burp out any trapped air before you go down.
Why does new neoprene feel so tight?
New neoprene compresses and relaxes with use, so a boot, glove, or hood that feels firm out of the packaging usually settles slightly after a few dives. It should still be snug afterward rather than loose, because neoprene that stretches into a loose fit was probably oversized to begin with. Buy for a snug fit when new, but never for a fit that restricts circulation or breathing.
Do I need to change my weighting when I add a hood, gloves, and boots?
Yes, because every piece of neoprene you add is buoyancy, and a hood, boots, and thick gloves together can shift your weighting noticeably. Do a proper buoyancy check any time you change your exposure protection rather than assuming your usual weight still works. The weight-check procedure is covered in your training, and a dive professional can help you re-do it.
How do I care for dive boots, gloves, and hoods?
Rinse them inside and out in fresh water after every dive day, since they hold sweat and salt more than any other gear, and dry them fully inside-out before packing. Dry them out of direct sunlight and never on a heater, because heat hardens neoprene and weakens glued seams. Store them dry and unfolded, as damp neoprene sealed in a bag is how gear picks up a permanent smell.
What sizes do the Seac Basic HD 5mm dive boots come in?
The Seac Basic HD Diving Boots W/Zip 5mm are available in sizes 2XS, XS, S, M, L, XL, 2XL, 3XL, and 4XL, covering a wide range of unisex adult foot sizes. Try them with the socks or liners you plan to dive in, and check that your fin's foot pocket can accommodate the boot's added bulk.
Is the 5mm thickness enough for cold water diving?
5mm neoprene offers solid warmth for a range of conditions, but cold tolerance varies by diver and dive length. For very cold conditions, consider whether a thicker boot in Seac's lineup, such as 7mm, better matches your typical water temperature.
How does the zipper and strap closure work on these boots?
The boots close with a stainless steel side zipper plus a Velcro strap, which together make them easy to put on and take off.




















