Skip to content

Free Domestic Shipping Over £100

30 DAY RETURNS

Help Wishlist JOIN US

Featured

New Arrivals
Best Sellers
Better in Black
Workout Sets
Accessories
E-Gift Card
Sale
Coming Soon

Category

All Products
Shorts
Leggings
Bras
T-Shirts & Tops
Sweaters & Jackets
Pants
Tank Tops
Bodysuits

Collections

Sol
Pump
Amplify
Seamless
Softcurve
Aura
Tenacity

Guides

Sports Bra Guide
Shorts Guide
Leggings Guide

BRAS

SHORTS

LEGGINGS

Share the Look
FAQ
Loyalty Program
Discounts
About Us
Contact Us

Featured

New Arrivals
Best Sellers
Better in Black
Accessories
E-Gift Card
Sale
Coming Soon

Clothing

All Products
Shorts
Shirts
Pants
Tanks & Stringers
Sweaters & Jackets
Long Sleeve Shirts
Boardshorts
Swimwear
Underwear

SHIRTS

SHORTS

PANTS

Share the Look
FAQ
Loyalty Program
Discounts
About Us
Contact Us

Account
United Kingdom

Change country
Update your country and language to be accurate with the place you're browsing from.

Change currency

Women
Men

United Kingdom

Change country
Update your country and language to be accurate with the place you're browsing from.

Change currency
Search

Search

Something went wrong. Please try again!
Log in
Cart

Men's

Running

Showing97 of 97 products

Filter by

Proflex LS in Iron Charcoal – men's long-sleeve top

Proflex LS in Iron Charcoal – men's long-sleeve top in nylon fabric

QUICK ADD

Proflex LS

Men's Long Sleeve Shirt Iron Charcoal

£52.00

Regular price £52.00

XS

S

M

+4

Proflex LS in Tactical Olive – men's long-sleeve top

Proflex LS in Tactical Olive – men's long-sleeve top in nylon fabric

QUICK ADD

Proflex LS

Men's Long Sleeve Shirt Tactical Olive

£52.00

Regular price £52.00

XS

S

M

+4

Proflex Tee in White – men's t-shirt

Proflex Tee in White – men's t-shirt in nylon fabric

QUICK ADD

Proflex Tee

Men's Short Sleeve Shirt White

£48.00

Regular price £48.00

XS

S

M

+4

Proflex Tee in Iron Charcoal – men's t-shirt

Proflex Tee in Iron Charcoal – men's t-shirt in nylon fabric

QUICK ADD

Proflex Tee

Men's Short Sleeve Shirt Iron Charcoal

£48.00

Regular price £48.00

XS

S

M

+4

Precision Tee in Black – men's t-shirt

Precision Tee in Black – men's t-shirt in cotton fabric

Coming soon New

Precision Tee

Men's Short Sleeve Shirt Black

£36.00

Regular price £36.00

XS

S

M

+4

Precision Tee in Urban Steel – men's t-shirt

Precision Tee in Urban Steel – men's t-shirt in cotton fabric

QUICK ADD

Precision Tee

Men's Short Sleeve Shirt Urban Steel

£36.00

Regular price £36.00

XS

S

M

+4

Union Mineral Cutoff in Brown – men's tank top

Union Mineral Cutoff in Brown – men's tank top in cotton fabric

QUICK ADD

-40%

Union Mineral Cutoff

Men's Tank Top Brown

£25.20

Regular price ~~£42.00~~ Minimum price £25.20

XS

S

M

+4

Union Mineral Cutoff in Black – men's tank top

Union Mineral Cutoff in Black – men's tank top in cotton fabric

QUICK ADD

-40%

Union Mineral Cutoff

Men's Tank Top Black

£25.20

Regular price ~~£42.00~~ Minimum price £25.20

XS

S

M

+4

Union Mineral Cutoff in Washed Black – men's tank top

Union Mineral Cutoff in Washed Black – men's tank top in cotton fabric

QUICK ADD

-40%

Union Mineral Cutoff

Men's Tank Top Washed Black

£25.20

Regular price ~~£42.00~~ Minimum price £25.20

XS

S

M

+4

Union Mineral Cutoff in White – men's tank top

Union Mineral Cutoff in White – men's tank top in cotton fabric

QUICK ADD

-40%

Union Mineral Cutoff

Men's Tank Top White

£25.20

Regular price ~~£42.00~~ Minimum price £25.20

XS

S

M

+4

Fusion Tee in Black – men's t-shirt

Fusion Tee in Black – men's t-shirt in nylon fabric

Sold out

Fusion Tee

Men's Training Short Sleeve Shirt Black

£36.00

Regular price £36.00

AirFlex Mesh Short in Black – men's shorts

AirFlex Mesh Short in Black – men's shorts in polyester and mesh fabric

QUICK ADD

-30%

AirFlex Mesh Short

Men's Training Short Black

£29.40

Regular price ~~£42.00~~ Minimum price £29.40

XS

S

M

+3

Fusion Tee in Navy Seal – men's t-shirt

Fusion Tee in Navy Seal – men's t-shirt in nylon fabric

QUICK ADD

Fusion Tee

Men's Training Short Sleeve Shirt Navy Seal

£36.00

Regular price £36.00

XS

S

M

+4

Fusion Tee in Stone – men's t-shirt

Fusion Tee in Stone – men's t-shirt in nylon fabric

QUICK ADD

Fusion Tee

Men's Training Short Sleeve Shirt Stone

£36.00

Regular price £36.00

XS

S

M

+4

Apex Short in Black – men's shorts

Apex Short in Black – men's shorts in nylon fabric

QUICK ADD

New

Apex Short

Men's Training Short Black

£42.00

Regular price £42.00

XS

S

M

+3

Apex Short in White – men's shorts

Apex Short in White – men's shorts in nylon fabric

QUICK ADD

Apex Short

Men's Training Short White

£42.00

Regular price £42.00

S

M

L

+2

Apex Short in Muted Blue – men's shorts

Apex Short in Muted Blue – men's shorts in nylon fabric

QUICK ADD

Apex Short

Men's Training Short Muted Blue

£42.00

Regular price £42.00

S

M

L

+2

Precision Tee in Muted Blue – men's t-shirt

Precision Tee in Muted Blue – men's t-shirt in cotton fabric

Coming soon New

Precision Tee

Men's Short Sleeve Shirt Muted Blue

£36.00

Regular price £36.00

S

M

L

+2

AirFlex Mesh Short in Tactical Midnight – men's shorts

AirFlex Mesh Short in Tactical Midnight – men's shorts in polyester and mesh fabric

QUICK ADD

AirFlex Mesh Short

Men's Training Short Tactical Midnight

£42.00

Regular price £42.00

XS

S

M

+4

AirFlex Mesh Short in Chrome – men's shorts

AirFlex Mesh Short in Chrome – men's shorts in polyester and mesh fabric

QUICK ADD

AirFlex Mesh Short

Men's Training Short Chrome

£42.00

Regular price £42.00

XS

S

M

+4

Help

Share the Look
FAQ
Loyalty Program
Discounts
About Us
Contact Us

Help

Share the Look
FAQ
Loyalty Program
Discounts
About Us
Contact Us

More

Privacy Policy
Terms of Service
Accessibility

More

Privacy Policy
Terms of Service
Accessibility

Address

71-75 Shelton Street, Covent Garden, London, England, WC2H 9JQ

Address

71-75 Shelton Street, Covent Garden, London, England, WC2H 9JQ

Copyright © 2026 FourthPhase. All rights reserved. Powered by Shopify.

Payment methods

Your cart0

YOUR BAG IS EMPTY

Give your bag some love!

SHOP MEN'S SHOP WOMEN'S

Choose options

Quick cart is currently empty

No product has been selected yet.

NOTIFY ME WHEN AVAILABLE

SELECT A SIZE

EMAIL

Choosing a selection results in a full page refresh.