Lightweight training T-shirt with the JK mark.
A lighter athletic T-shirt for training, coaching and daily movement. Clean fit, breathable feel and bold Jump Knock identity.
Dispatched in 2-3 working days · tracked shipping.
Not right? Return unused items within 30 days.
“Genuinely changed how I train. Clear, structured and supportive - worth every penny.”
“Booked a session not knowing what to expect and left buzzing. Already rebooked.”
“Really knowledgeable and easy to follow. Saw progress within a fortnight.”
