NEW from RockTape, the ultimate weapon for workout domination - Assassins, an entirely new generation of knee sleeves. Assassins will keep you ahead of the game--keeping your knees supported and protected while slaying reps and crushing WODs.
Assassins can be used in a variety of sports and fitness pursuits, including: weightlifting, high-intensity interval training, obstacle course racing, running, cycling and other functional fitness endeavors.
Assassins are available in sizes extra small through extra large, with two thickness options: 5mm for moderate support and 7mm for maximum support.
Assassins were formulated with the unique needs of athletes in mind, and unlike sleeves from other companies, are much more than a re-purposed medical knee support.
We fine-tuned Assassins through three years of feedback from both RockTape customers and professional athletes like Ashley Horner, Marcus Filly, and Neal Maddox to provide the ultimate knee supports.
The result is a pair of knee sleeves that are suitable for the most grueling workouts, lifting events, and obstacle course races - yet comfortable enough for the weekend warrior.

Taller than standard sleeves, and carefully constructed with a unique organic design, Assassins support the knee and compresse the vastus medals oblique (VMO) at its insertion point above the patella. This helps ensure proper stability and tracking of the knee, and can often dramatically reduce non-specific knee pain, particularly during squats.
The extra-tall design also keeps sleeves in place - preventing excess slippage and shifting during workouts - a common complaint of competing sleeves.
Protective gear should always be reasonably priced and available to anyone. We also believe that every athlete deserves two sleeves - that's why Assassins are always sold as a pair.
When compared to the competition, Assassins' quality and price can't be matched.
Engineered with a synthetic fabric shell bonded to SBR neoprene and secured via double-mauser stitching, Assassins comfortably support the knee joint through countless workouts.
Rigorous life-cycle testing by both our own athletes and automated test programs guarantee superior quality. If any pair of Assassins fails to carry out their purpose, RockTape offers the industry’s only one-year warranty against defects and premature failure from date of purchase.
SBR Neoprene
Double Mauser stitching
Durable-yet flexible front panels
4-way stretch lycra side panels
Extra tall design for VMO compression
Measure the circumference of your knee around the center of your patella. Assassins start very snug and can take a few sessions to break in. If you measure on the higher end of a size, we recommend ordering the next size up.
XS: 10.5" (26,5cm) and below
S: 10.5" (26,5cm) - 12.5" (32cm)
M: 12.5" (32cm) - 13.5" (34cm)
LG: 13.5" (34cm) - 14.5" (35,5cm)
XL: 14.5 (35,5cm) - above
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(Valid from 26.5.2025)
Products are sold by MJP Group Oy (Business ID FI2643976-7). We sell to adults (18 +) and businesses worldwide.
For customers inside the EU/EEA all prices include Finnish value-added tax (VAT):
• standard 25,5 %
• reduced 14 %
Orders delivered outside the EU/EEA are supplied tax-free (0 % VAT). Local customs duties, taxes and import fees are the buyer’s responsibility.
EU business customers with a valid VAT number may request reverse-charge invoicing — e-mail us at sportheavy@sportheavy.fi.
A valid e-mail address, phone number and delivery address are required. Placing an order means you accept the terms in force on that date. You will receive an order-confirmation e-mail listing the goods, delivery costs and total price. Our logistics partner will notify you by e-mail, phone call or SMS when the parcel is ready for dispatch or pick-up.
Paytrail Plc (business ID 2122839-7) acts as the collecting payment service provider and will appear as the payee on your card or bank statement. The payment is forwarded immediately to MJP Group Oy. Paytrail is an authorised payment institution supervised by the Finnish Financial Supervisory Authority.
Paytrail Plc
Innova 2, Lutakonaukio 7
40100 Jyväskylä, Finland
Tel. +358 207 181 830
www.paytrail.com
PayPal (Europe) S.à r.l. et Cie, S.C.A. provides PayPal payments. It is a Luxembourg-registered credit institution authorised and supervised by the Commission de Surveillance du Secteur Financier (CSSF). PayPal appears as the payee on your PayPal account or card statement and settles the funds to MJP Group Oy.
PayPal (Europe) S.à r.l. et Cie, S.C.A.
22-24 Boulevard Royal
L-2449 Luxembourg
Trade Register: R.C.S. Luxembourg B 118 349
www.paypal.com
Shipping methods and costs are shown on the checkout page after you have selected the destination country.
You may return or exchange any non-food product within 14 days of delivery. Items must be unused, in their original packaging with all tags and factory protective films intact. Include a completed return form. After inspection we refund the product price; shipping fees are not refunded.
If you are outside Finland, you must ship the return yourself to the address listed on the return form.
Custom-made items (e.g. personalised name tags, custom blade profiling) are non-refundable.
Need help? Contact us at sportheavy@sportheavy.fi. If a parcel or product is damaged, photograph the damage, keep the packaging and notify us immediately so we can file a claim with the carrier.
We reserve the right to modify these terms at any time. Please read the current terms before ordering.
MJP Group Oy handles all customer data confidentially and will not disclose it to third parties except as required for payment processing or delivery.