Can I Return Or Exchange My Item?

Should you not be satisfied with your order, you have 30 days from the date of delivery to return it for an exchange, full refund, or gift voucher credit.All exchanges are free using our returns portal. Please note that returns for a refund will have a shipping fee deducted: £5.00 for UK orders, and approximately £10.00 for international orders (depending on the country) to cover the cost of return postage.Read our full returns policy here

Can I Pay With Klarna Or Clearpay?

At ThruDark we are constantly striving to deliver a better service to our customers. With Klarna we can now offer all UK and international customers Buy Now, Pay Later with Klarna using their pay in 3 instalments with 0% interest and no fees.With Clearpay we can now offer UK, US, Australian and Canada customers to pay in 4 instalments interest-free over 6 weeks. Please note: Klarna & Clearpay is unavailable for pre-order items. Learn more on our partnership with Klarna & Clearpay

Mainland UKFree standard delivery is available on orders of £175 or above.Free next-day delivery is available on orders of £350 or above.For orders below these thresholds, a range of delivery options is available at checkout.Estimated timeframes are provided by the couriers and should be used as a guide only.Channel Islands & UK OffshoreDelivery options for Guernsey, Jersey and the Isle of Man are shown at checkout, with timeframes provided as courier estimates.Shipping Method Cut-off TimesDelivery estimates apply to orders placed before the cut-off times listed below.Orders placed after the cut-off on Fridays will be dispatched on the next working day.Royal Mail Standard – 4:00 PM, Monday to FridayRoyal Mail Express – 2:30 PM, Monday to FridayDHL Express – 2:00 PM, Monday to FridayFedEx – 2:00 PM, Monday to FridayAdditional InformationDelivery timeframes are estimates only and may vary by location or during busy periods.All estimates refer to working days (Monday to Friday, excluding UK bank holidays).Next-day services may take 1–3 working days for Highlands and Northern Ireland.Order values are shown in GBP and will be converted to your local currency at checkout.Any additional delivery or customs charges are the responsibility of the customer.If Royal Mail is unable to deliver to a business address, it may be due to address accuracy, access issues, safety concerns, delivery holds, or local service disruptions. Please check for service updates or contact customer support if needed.

International Shipping

All international shipping amounts will be calculated at checkout.Delivery times may vary depending on shipping location and during busier periods.All estimates are based on working days, which are Monday to Friday, excluding UK bank holidays.Next-day services are estimated at 1-3 days for Highlands and Northern Ireland.International orders are shipped Delivered Duty Paid (DDP) with import duties and taxes covered — except orders to the United States, where taxes are calculated at checkout.Please note: we do not reimburse any additional delivery or customs fees.All amounts are based on GBP and are converted to your local currency at checkout.We will not reimburse customers who pay any additional delivery or customs fees. All international shipping amounts will be calculated at checkout

We provide tracking numbers on all orders once fulfilled and dispatched by our warehouse team. These can be used to follow the progress of your delivery and in some cases to change address or delivery details if required. Please see below for links to track and manage your parcel with our respective couriers:Royal Mail - https://www.royalmail.com/track-your-item DHL - https://www.dhl.com/gb-en/home/tracking.html?locale=true *If you need to change the delivery address on your shipment please use the DHL app or manage the shipment online with Royal Mail. Unfortunately, our Support team is unable to amend shipping addresses or make any other changes to your order once placed.*

A studio shot of Force Catalyst Shorts in Green (SS)

NEW

FORCE CATALYST SHORTS

8" jogger shorts

£80

Forest Green

Fit:

Regular

Studio Model is 6ft 3" and wears size: L

Size & Fit

This size guide offers a reference for how your body measurements align with our gear. With each garment offering specific tailoring and fits, use this as a guideline for which size to select based off your body measurements.

Size	Waist	Inside Leg	Hip
XS	28	8	35
S	30	8	37
M	32	8	39
L	34	8	41
XL	36	8	43
XXL	38	8	45
3XL	40	8	47

Size	Waist	Inside Leg	Hip
XS	72	20	90
S	77	20	95
M	82	20	100
L	87	20	105
XL	92	20	110
XXL	97	20	115
3XL	102	20	120

Studio Model is 6ft 3" and wears size: L | Fit: Regular

Use our guide.

This guide gives you the garment measurements for each style. Every style has its own cut and construction, so compare the numbers with kit you already wear and choose the size that matches best.

A | Waist

Measure straight across the top of the fastened waistband, then double it for the full circumference. Keep the waistband flat.

B | Inseam

Measure from the crotch seam down the inside of the leg to the bottom hem. Keep the leg straight.

C | Front Rise

Measure from the crotch seam up the centre front to the top of the waistband. Keep the fabric flat.

D | Hem Width

Measure straight across the bottom opening of the leg from edge to edge. Keep the hem flat and unstretched.

Only 3 left in stock! In stock. In stock. In stock. In stock. In stock. Only 6 left in stock! In stock.

Earn 80 GoDark points when you purchase this product
Free shipping on all orders over £175
Free exchanges and easy returns
2 Year Warranty & lifetime repairs

COMPLETE THE KIT

force catalyst t-shirt

Forest Green

£65

force catalyst hoodie

Forest Green

£130

FEATURES

Drawstring waistband

Internal drawstring for improved fit.

ThruDark Waistband

Branded elastic waistband for secure, low-profile comfort during movement.

Embroidered ThruDark Branding

Finished with embroidered ThruDark branding.

Zipped Pocket

For stowage of small valuables including keys and headphones.

Quick Add

FORCE CATALYST JOGGERS

Cuffed sweatpants

Sold out £130

Shop All

FAQS

Should you not be satisfied with your order, you have 30 days from the date of delivery to return it for an exchange, full refund, or gift voucher credit.
All exchanges are free using our returns portal. Please note that returns for a refund will have a shipping fee deducted: £5.00 for UK orders, and approximately £10.00 for international orders (depending on the country) to cover the cost of return postage.
Read our full returns policy here
At ThruDark we are constantly striving to deliver a better service to our customers. With Klarna we can now offer all UK and international customers Buy Now, Pay Later with Klarna using their pay in 3 instalments with 0% interest and no fees.
With Clearpay we can now offer UK, US, Australian and Canada customers to pay in 4 instalments interest-free over 6 weeks.

Please note: Klarna & Clearpay is unavailable for pre-order items.

Learn more on our partnership with Klarna & Clearpay
Mainland UK
Free standard delivery is available on orders of £175 or above.
Free next-day delivery is available on orders of £350 or above.
For orders below these thresholds, a range of delivery options is available at checkout.
Estimated timeframes are provided by the couriers and should be used as a guide only.
Channel Islands & UK Offshore
Delivery options for Guernsey, Jersey and the Isle of Man are shown at checkout, with timeframes provided as courier estimates.
Shipping Method Cut-off Times
Delivery estimates apply to orders placed before the cut-off times listed below.
Orders placed after the cut-off on Fridays will be dispatched on the next working day.
- Royal Mail Standard – 4:00 PM, Monday to Friday
- Royal Mail Express – 2:30 PM, Monday to Friday
- DHL Express – 2:00 PM, Monday to Friday
- FedEx – 2:00 PM, Monday to Friday
Additional Information
- Delivery timeframes are estimates only and may vary by location or during busy periods.
- All estimates refer to working days (Monday to Friday, excluding UK bank holidays).
- Next-day services may take 1–3 working days for Highlands and Northern Ireland.
- Order values are shown in GBP and will be converted to your local currency at checkout.
- Any additional delivery or customs charges are the responsibility of the customer.
- If Royal Mail is unable to deliver to a business address, it may be due to address accuracy, access issues, safety concerns, delivery holds, or local service disruptions. Please check for service updates or contact customer support if needed.
All international shipping amounts will be calculated at checkout.
Delivery times may vary depending on shipping location and during busier periods.
All estimates are based on working days, which are Monday to Friday, excluding UK bank holidays.
Next-day services are estimated at 1-3 days for Highlands and Northern Ireland.
International orders are shipped Delivered Duty Paid (DDP) with import duties and taxes covered — except orders to the United States, where taxes are calculated at checkout.
Please note: we do not reimburse any additional delivery or customs fees.
All amounts are based on GBP and are converted to your local currency at checkout.
We will not reimburse customers who pay any additional delivery or customs fees.
All international shipping amounts will be calculated at checkout
We provide tracking numbers on all orders once fulfilled and dispatched by our warehouse team. These can be used to follow the progress of your delivery and in some cases to change address or delivery details if required. Please see below for links to track and manage your parcel with our respective couriers:
- Royal Mail - https://www.royalmail.com/track-your-item
- DHL - https://www.dhl.com/gb-en/home/tracking.html?locale=true
*If you need to change the delivery address on your shipment please use the DHL app or manage the shipment online with Royal Mail. Unfortunately, our Support team is unable to amend shipping addresses or make any other changes to your order once placed.*