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

5mm Commercial Delta Flex Wetsuit


The Northern Diver Commercial Delta Flex is a semi-dry wetsuit is the most popular wetsuit choice for the commercial and oil industries. It's is also supplied to the military worldwide giving you peace of mind that it can endure anything you can think of as it is used by professionals in multiple sectors. The suit's hard-wearing properties are complemented by the ultimate comfort offered by the soft yet durable superstretch neoprene. The internal lining offers superb warmth and insulation with...

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  • 5mm superstretch neoprene construction
  • 5mm long john (short arms, long legs) - front entry zip, smooth skin arm and ankle seals, zipped ankle warmers, collar (secured with Velcro)
  • 5mm step-through beavertail over jacket - smooth skin wrist seals including zipped warmers, overprinted cuffs to secure wrist gauges, front entry diagonal plastic 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
  • Separate 5mm hood supplied with the set

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 (3 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.

Recreational diving

By Gary Fletcher on 13 Jul. 2020

I bought this to replace an OThree semi dry wetsuit. I wanted a 2 piece this time and ended up with this. I'm extremely happy with it. It's very flexible and user friendly. Also, it's easy to get into and out of, also it means I can put the steamer on & watch everyone else struggling with a one piece and back zip, before putting the last bit on. The semi dry works great, and the zips on the cuffs and legs make it even easier. I definitely recommend this for my usage (recreational), and will look at Northern Divers when I need to replace my drysuit.

Excellent semi dry suit

By Nigel Bond on 30 May. 2023

I used this for the first time last Thursday and Friday in 12 degree sea near Plymouth. First day we were in the water for 90 minutes and second day over 2 hours. Wasn't cold at all and to say that I am at the very top end weight of the medium size it was relatively easy to get on and to zip up myself. I would say the size chart seems very accurate and I think it would fit even better if I lose 5kg or so, which I need to do! Couldn't be happier with it and it is also great value for money.


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.