Delivery to UK Mainland from £2.50
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14 Day Refunds & Return Policy

5mm Commercial Delta Flex Black Wetsuit


The Delta Flex Black semi-dry wetsuit is the most popular wetsuit for the commercial and oil industries. It's also supplied to the military worldwide. The suit's hard-wearing properties are complemented by the ultimate comfort offered by the super-stretch DFN-Ultragrade™ neoprene. The internal lining offers superb warmth and insulation with its Ti-Ax® Thermacote® titanium terry, now with an anti-bacterial coating. The build quality is exactly what divers have come to expect from Northern...

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  • DFN-Ultragrade™ Superstretch neoprene build
  • 5mm long john (short arms, long legs) - front entry zip, Smooth Skin arm and ankle seals, zipped ankle warmers, collar (secured with hook and loop patches)
  • 5mm step-through crotch jacket - Smooth Skin wrist seals inc. zipped warmers, front entry diagonal zip
  • Both garments include Ti-Ax® Thermacote® titanium lining for extra thermal protection
  • Ergonomic anatomical design with pre-formed knee and elbow areas
  • Triple glued, blind stitched seams

Delivery, Returns & Instore Collection

When will I receive my order?

International Delivery Times

Monday – Friday 3 – 5 Working Days

UK Mainland Delivery Times

Monday – Friday before 2pm Next Working Day
Monday – Friday after 2pm 2 Working Days
Saturday & Sunday 2 Working Days

UK Extended Areas Delivery Times

Monday – Sunday 3 – 5 Working Days

Please note delivery times may be extended during busy periods.

EU Areas

Please note that due to changes by HMRC, orders being shipped to EU countries will not be shipped on the same day as they are invoiced. EU Orders will now be shipped on the next working day. This only applies to E.U. orders. Domestic and Worldwide shipments remain the same.

Collect In Store?

When you go to the online checkout, you can opt to collect your items in store. We'll let you know when your order is ready for you to collect. Your order will normally be ready to collect the next working day.

Returns, refunds or exchanges?

You can return any item within 28 days of receipt for a refund, provided the item is unused, in its original packaging and in 'as new' condition.

Items will be refunded in full (less postage) if received within 28 days from the date of despatch.


We aim to deal with all returns and exchanges on the day they arrive, however please allow longer during peak periods.

You can return the item(s) by dropping them off in store or by returning the item(s) by post. We do not insist on a specific courier service for the return, so please use the most economical or appropriate method for returning the item(s).

Northern Diver (Int) Ltd
Appley Lane North
Appley Bridge

If an item becomes faulty after a period of time then please contact customer services (01257 254 444 or prior to returning the item. We will either repair or replace the item at our discretion.

Tell Us What You Think

Customer Reviews

5 out of 5 Stars (1 reviews)

Write a Review

Very Hard Wearing

By Jerry Bryant on 15 Nov. 2016

I've used this in a commercial environment for almost 18 months now and compared to other wetsuits I've tried, this one has far outlasted all the others. Very comfortable and easy to get in and out of in a hurry. Very hard wearing but unlike some heavy duty wetsuits it's still flexible and doesn't restrict movement too much when wearing it. If it ever wears out I will definitely replace it with the same. Great quality and a joy to use.


Trade Customers

Northern Diver offers trade accounts. Please click here to register your details and find out if you qualify. Once your trade account has been confirmed you can view all trade prices and shop easily online when logged into your account. Please note when you are not logged in to your trade account retail prices are shown. If you have any queries please do not hesitate to contact us. Tel: +44 (0) 1257 25 44 44.