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Designed for the demands of mountain biking, the Poseidon Jacket features an oversized, helmet-compatible hood with two-way shock cord adjustment for a precise fit. Extended cuffs with Velcro tabs lock out water and mud, while the laminated waterproof two-way zipper ensures a secure seal against the elements.
Diagonal hybrid vent pockets cut across the body, also sealed with laminated waterproof zippers. These versatile openings secure your essentials while doubling as large ventilation channels.
A spacious rear storage pouch keeps gloves, snacks, or trail tools within easy reach, so you’re never caught unprepared. Reflective logos provide visibility when the light fades, making the Poseidon Jacket a true companion for wherever your odyssey takes you.
Features
- 3L TriDent™ fabric with fully taped seams
- Hybrid vent/pockets for body ventilation
- Oversized helmet compatible hood
- Extended cuffs with Velcro adjustment
- Two-way shock cord hood adjustment
- Large rear storage pouch
- Laminated waterproof two-way zipper
- Reflective logos
Aftercare
Water repellency can be maintained with Grangers Performance Repel Plus. Spray evenly onto damp garment after washing. Use a hairdryer to apply a small amount of heat for maximum effectiveness.
Poseidon Jacket Size Guide
Poseidon Jacket Size Chart
Size |
|
Body Length |
S | 19.5" | 27" |
M | 21" | 28" |
L | 22.5" | 29" |
XL | 24" | 30" |
|
25.5" | 31" |
Sizing Tips
- This style of size chart measures the garment dimensions to provide a more accurate idea of fit compared to your own items of clothing, rather than suggestions based on body size.
- Lay out your own hoodie or jacket flat and measure from pit-to-pit and shoulder-to-hem. Compare the figures to the ½ Chest Width and Body Length sizes.
- Odyssey Activewear clothing dimensions are similar to some global brands. Customers should generally order their usual size.
Delivery Information
Destination | Avg. delivery time | Shipping cost |
🇬🇧 UK | 1-2 days |
£5 |
🌐 International | 4-7 days |
£15 |
Orders placed on Friday afternoon will be processed the following Monday (with the exception of Bank Holidays)
Shipping destinations outside the UK may be liable to import duty or customs charges. Any additional fees must be paid by the recipient.
FREE 30 Day Returns
If you are not happy with your order, you are welcome to return it within 30 days. We’ll even cover the return postage cost! Conditions apply, please see the Returns page for more information.


3L Waterproof Fabric
The Odyssey Activewear® Poseidon Jacket is made from our 3-layer TriDent™ fabric—an armour comprising of a water-repellent shell, bonded membrane, and protective inner backing for maximum waterproofing to weather any epic journey.
Fully Taped Seams
The thousands of tiny holes made from stitching fabric together are the Achilles’ heel of any waterproof jacket—the Trojan horse through which water would otherwise invade. But this vulnerability is fortified with tightly bonded taping along every seam, ensuring the Poseidon Jacket remains impenetrable.
Hybrid Pocket Vents
The two large diagonal openings across the body serve a dual purpose as hybrid pocket vents. Sealed with waterproof laminated zippers, these ports provide secure storage and allow you to summon cooling airflow when the heat rises.


